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The Columbian Exchange: Crash Course World History #23
 
12:09
In which John Green teaches you about the changes wrought by contact between the Old World and the New. John does this by exploring the totally awesome history book "The Columbian Exchange" by Alfred Cosby, Jr. After Columbus "discovered" the Americas, European conquerors, traders, and settlers brought all manner of changes to the formerly isolated continents. Disease and invasive plant and animal species remade the New World, usually in negative ways. While native people, plants, and animals were being displaced in the Americas, the rest of the world was benefitting from American imports, especially foods like maize, tomatoes, potatoes, pineapple, blueberries, sweet potatoes, and manioc. Was the Columbian Exchange a net positive? It's debatable. So debate. Resources: The Columbian Exchange, by Alfred Cosby, Jr: http://dft.ba/-columbian Crash Course World History is now available on DVD! http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! ‪http://www.facebook.com/youtubecrashcourse Follow us again! ‪http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse
Views: 2615950 CrashCourse
Muscles, part 1 - Muscle Cells: Crash Course A&P #21
 
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We're kicking off our exploration of muscles with a look at the complex and important relationship between actin and myosin. Your smooth, cardiac, and skeletal muscles create movement by contracting and releasing in a process called the sliding filament model. Your skeletal muscles are constructed like a rope made of bundles of protein fibers, and that the smallest strands are your actin and myosin myofilaments. Its their use of calcium and ATP that causes the binding and unbinding that makes sarcomeres contract and relax. Table of Contents Smooth, Cardiac, and Skeletal Muscles Create Movement 1:18 Sliding Filament Model 4:52 Skeletal Muscles Are Made of Bundles of Protein Fibers 2:40 Actin and Myosin Myofilaments 3:54 Calcium and ATP Cause the Binding and Unbinding 5:05 *** Crash Course is now on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark Brouwer, Jan Schmid, Steve Marshall, Anna-Ester Volozh, Sandra Aft, Brad Wardell, Christian Ludvigsen, Robert Kunz, Jason, A Saslow, Jacob Ash, Jeffrey Thompson, Jessica Simmons, James Craver, Simun Niclasen, SR Foxley, Roger C. Rocha, Nevin, Spoljaric, Eric Knight, Elliot Beter, Jessica Wode ***SUBBABLE MESSAGES*** TO: SEM students FROM: Mrs. S You are confident and courageous! I believe in you! DFTBA! -- TO: Zachary FROM: She who gave you life! You, like the Mongols, will always be the exception. ***SUPPORTER THANK YOU!*** Thank you so much to all of our awesome supporters for their contributions to help make Crash Course possible and freely available for everyone forever: David Rybka, Beth Larter, Damian Shaw, Randy Goldberg MD, Cynthia Krohn, Allison DeVoe, Brinae Lois Gaudet, Sara Bovi, Stephen DeCubellis, Travis Bell -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 2279209 CrashCourse
The Heart, part 1 - Under Pressure: Crash Course A&P #25
 
10:08
Your heart gets a lot of attention from poets, songwriters, and storytellers, but today Hank's gonna tell you how it really works. The heart’s ventricles, atria, and valves create a pump that maintains both high and low pressure to circulate blood from the heart to the body through your arteries, and bring it back to the heart through your veins. You'll also learn what your blood pressure measurements mean when we talk about systolic and diastolic blood pressure. Table of Contents Heart's Ventricles, Atria and Valves Create a Pump 3:25 Maintains Both High and Low Pressure 3:25 Blood Circulates From the Heart to the Body Through Your Arteries 4:47 Blood Circulates From the Body to the Heart Through Your Veins 4:49 Systolic and Diastolic Blood Pressure 7:58 Crash Course Psychology posters available now at DFTBA.com! http://www.dftba.com/crashcourse *** Crash Course is now on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark Brouwer, Jan Schmid, Anna-Ester Volozh, Robert Kunz, Jason A Saslow, Christian Ludvigsen, Chris Peters, Brad Wardell, Beatrice Jin, Roger C. Rocha, Eric Knight, Jessica Simmons, Jeffrey Thompson, Elliot Beter, Today I Found Out, James Craver, Ian Dundore, Jessica Wode, SR Foxley, Sandra Aft, Jacob Ash, Steve Marshall ***SUBBABLE MESSAGES*** TO: My Student FROM: Earle Check out www.youtube.com/amorsciendi for supplementary content. -- TO: Everyone FROM: Magnus Krokstad Keep dreaming! ***SUPPORTER THANK YOU!*** Thank you so much to all of our awesome supporters for their contributions to help make Crash Course possible and freely available for everyone forever: Damian Shaw, Taylor Garget, Emily Barker, Librarifan, Damian Shaw, Courtney Spurgeon, juliagraph, Katherine Allen, Stephen DeCubellis, Vanessa Benavent -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 2145928 CrashCourse
Existentialism: Crash Course Philosophy #16
 
08:54
Now that we’ve left behind the philosophy of religion, it’s time to start exploring what other ways might exist to find meaning in the world. Today we explore essentialism and its response: existentialism. We’ll also learn about Jean-Paul Sartre and his ideas about how to find meaning in a meaningless world. Get your own Crash Course Philosophy mug from DFTBA: http://store.dftba.com/products/crashcourse-philosophy-mug The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV -- Taylor Swift drawing by Joezart: http://joezart.deviantart.com/art/Taylor-Swift-569846131 Graduate and proud parents by Christopher Brown: https://www.flickr.com/photos/xopherbrown/5621125839 All other images and video either public domain or via VideoBlocks, Unsplash, or Wikimedia Commons, licensed under Creative Commons BY 4.0: https://creativecommons.org/licenses/by/4.0/ -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Crash Course Philosophy is sponsored by Squarespace. http://www.squarespace.com/crashcourse -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 2484095 CrashCourse
Immune System, part 1: Crash Course A&P #45
 
09:13
Our final episodes of Anatomy & Physiology explore the way your body keeps all that complex, intricate stuff alive and healthy -- your immune system. The immune system’s responses begin with physical barriers like skin and mucous membranes, and when they’re not enough, there are phagocytes -- the neutrophils and macrophages. It also features the awesomely named natural killer cells and the inflammatory response, and we'll explain how all of these elements work together to save the day if you happen to slip on a banana peel. Crash Course A&P poster: http://store.dftba.com/products/crashcourse-anatomy-and-physiology-poster Table of Contents Physical Barriers Like Skin and Mucous Membranes 2:01 Phagocytes: Neutrophils and Macrophages 3:17 Natural Killer Cells 4:29 Inflammatory Response 5:29 *** "Reformat" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/ *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 2055938 CrashCourse
Mansa Musa and Islam in Africa: Crash Course World History #16
 
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In which John Green teaches you about Sub-Saharan Africa! So, what exactly was going on there? It turns out, it was a lot of trade, converting to Islam, visits from Ibn Battuta, trade, beautiful women, trade, some impressive architecture, and several empires. John not only cover the the West African Malian Empire, which is the one Mansa Musa ruled, but he discusses the Ghana Empire, and even gets over to East Africa as well to discuss the trade-based city-states of Mogadishu, Mombasa, and Zanzibar. In addition to all this, John considers emigrating to Canada. Crash Course World History is now available on DVD! http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! ‪http://www.facebook.com/youtubecrashcourse Follow us again! ‪http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://patreon.com/crashcourse
Views: 2826818 CrashCourse
The Nervous System, Part 2 - Action! Potential!: Crash Course A&P #9
 
11:44
•••SUBBABLE MESSAGE••• TO: Carla FROM: Christopher Next stop is whenever. Just be like, "stop." *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content. *** What do you and a sack of batteries have in common? Today, Hank explains. -- Table of Contents: Ion Channels Regulate Electrochemistry to Create Action Potential 4:51 Resting State 3:22 Depolarization 6:09 Repolarization 7:35 Hyperpolarization 8:00 -- CRASH COURSE KIDS! http://www.youtube.com/crashcoursekids Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 2588040 CrashCourse
Meiosis: Where the Sex Starts - Crash Course Biology #13
 
11:43
Hank gets down to the nitty gritty about meiosis, the special type of cell division that is necessary for sexual reproduction in eukaryotic organisms. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Follow CrashCourse on Twitter: http://www.twitter.com/thecrashcourse References for this episode can be found in the Google document here: http://dft.ba/-2wDm Table of Contents 1) Homologous Chromosome Pairs 2:10 2) Primary Oocytes 3:30 3) Primary Spermatocytes 3:30 4) Meiosis 2:59 5) Interphase I 4:04 6) Prophase I 4:37 a) Crossover 5:05 b) Recombination 5:05 7) Metaphase I 7:53 8) Anaphase I 8:05 9) Telophase I 8:19 10) Prophase II 8:57 11) Metaphase II 9:23 12) Anaphase II 9:28 13) Telophase II 9:32 Want to see Hank play Assassin's Creed? Check out http://www.youtube.com/hankgames Watch the AC: Brotherhood playlist here: http://www.youtube.com/playlist?list=PL0B3CD662A033D273 Watch the AC: Revelations playlist here: http://www.youtube.com/playlist?list=PLC5C810D94ADB2080 reproduction, sexual reproduction, sex cell, sperm, egg, meiosis, crashcourse, crash course, biology, cell replication, chromosome, gene, allele, homologous chromosome, haploid cells, prophase, metaphase, anaphase, telophase, oocyte, spermatocyte, centrosome, microtubule, crossover, homologous recombination, natural selection, cytokinesis, polar body, endosperm Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 3071124 CrashCourse
Mitosis: Splitting Up is Complicated - Crash Course Biology #12
 
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Hank describes mitosis and cytokinesis - the series of processes our cells go through to divide into two identical copies. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Follow CrashCourse on Twitter: http://www.twitter.com/thecrashcourse References for this video can be found in the Google document here: http://dft.ba/-2rVV Table of Contents 1. Mitosis 0:24 2. Interphase 3:27 a) Chromatin 3:37 b) Centrosomes 3:52 3) Prophase 4:14 a) Chromosomes 4:18 b) Chromatid 4:31 c) Microtubules 5:07 4) Metaphase 5:22 a) Motor Proteins 5:36 5) Biolography 6:13 6) Anaphase 9:00 7) Telophase 9:15 8) Cleavage 9:25 9) Cytokinesis 9:36 This video contains the following sounds from Freesound.org: "Swishes.wav" by Pogotron "Opening Scotch Whisky.mp3" by Percy Duke crashcourse, biology, mitosis, cell biology, cell division, cell, replication, splitting, chromosome, diploid cells, nucleus, DNA, prophase, metaphase, anaphase, telophase, interphase, chromatin, chromatid, centrosome duplication, centromere, microtubules, motor protein, walter flemming, tomomi kiyomitsu, dynein, cleavage, cytokinesis, daughter cells, science, education, college, university, learn, teach, hank green Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 3862377 CrashCourse
The French Revolution: Crash Course World History #29
 
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In which John Green examines the French Revolution, and gets into how and why it differed from the American Revolution. Was it the serial authoritarian regimes? The guillotine? The Reign of Terror? All of this and more contributed to the French Revolution not being quite as revolutionary as it could have been. France endured multiple constitutions, the heads of heads of state literally rolled, and then they ended up with a megalomaniacal little emperor by the name of Napoleon. But how did all of this change the world, and how did it lead to other, more successful revolutions around the world? Watch this video and find out. Spoiler alert: Marie Antoinette never said, "Let them eat cake." Sorry. Crash Course World History is now available on DVD! http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! ‪http://www.facebook.com/youtubecrashcourse Follow us again! ‪http://thecrashcourse.tumblr.com Crash Course goods are available now: http://store.dftba.com/collections/crashcourse Thermidor (which is this month) is Revolutions month on Crash Course! The American Revolution: http://www.youtube.com/watch?v=HlUiSBXQHCw Coming soon: #30 - Haitian Revolution #31 - Latin American Revolutions #32 - Industrial Revolution Support Crash Course on Patreon: http://patreon.com/crashcourse
Views: 5430729 CrashCourse
The Nervous System, Part 1: Crash Course A&P #8
 
10:36
•••SUBBABLE MESSAGE••• TO: Kerry FROM: Cale I love you with all my ha-art. Deadset. *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content. *** Today Hank kicks off our look around MISSION CONTROL: your nervous system. -- Table of Contents: Sensory Input, Integration and Motor Output 1:36 Organization of Central and Peripheral Systems 2:16 Glial Cells 3:54 Role, Anatomy and Function of Neuron Types 5:23 Structure and Function of Neurons 6:20 -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 3025844 CrashCourse
ATP & Respiration: Crash Course Biology #7
 
13:26
In which Hank does some push ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse Special thanks go to Stafford Fitness (www.staffordfitness.net) for allowing us to shoot the gym scenes in their facilities. This video uses sounds from Freesound.org, a list of which can be found, along with the CITATIONS for this episode, in the Google Document here: http://dft.ba/-25Ad Table of Contents: 1) Cellular Respiration 01:00 2) Adenosine Triphosphate 01:29 3) Glycolysis 4:13 A) Pyruvate Molecules 5:00 B) Anaerobic Respiration/Fermentation 5:33 C) Aerobic Respiration 6:45 4) Krebs Cycle 7:06 A) Acetyl COA 7:38 B) Oxaloacetic Acid 8:21 C) Biolography: Hans Krebs 8:37 D) NAD/FAD 9:48 5) Electron Transport Chain 10:55 6) Check the Math 12:33 TAGS: crashcourse, biology, science, chemistry, energy, atp, adenosine triphosphate, cellular respiration, glucose, adp, hydrolysis, glycolysis, krebs cycle, electron transport chain, fermentation, lactic acid, enzyme, hans krebs, citric acid, ATP synthase Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 5579904 CrashCourse
Utilitarianism: Crash Course Philosophy #36
 
10:01
Our next stop in our tour of the ethical lay of the land is utilitarianism. With a little help from Batman, Hank explains the principle of utility, and the difference between act and rule utilitarianism. Get your own Crash Course Philosophy mug or Chom Chom shirt from DFTBA: https://store.dftba.com/collections/crashcourse The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 1242043 CrashCourse
The Nucleus: Crash Course Chemistry #1
 
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Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles - the proton, neutron and electron - come together in trillions of combinations to form ... everything. In this inaugural episode of Crash Course Chemistry, we start out with one of the biggest ideas in chemistry ever - stuff is made from atoms. More specifically, we learn about the properties of the nucleus and why they are important to defining what an atom actually is. Like CrashCourse? http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse! http://www.twitter.com/TheCrashCourse Tumbl CrashCourse. http://thecrashcourse.tumblr.com Table of Contents Einstein & Atoms 02:05 Composition of Atoms 03:18 Atomic Number 04:20 Isotopes 08:04 Relative Atomic Mass 07:26 Mass Number 07:44 Watch the SciShow episodes on the Strong Nuclear Force here: http://www.youtube.com/watch?v=Yv3EMq2Dgq8 and http://www.youtube.com/watch?v=BNDOSMqGLlg Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 4297972 CrashCourse
Kant & Categorical Imperatives: Crash Course Philosophy #35
 
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Our next stop on our tour of ethics is Kant’s ethics. Today Hank explains hypothetical and categorical imperatives, the universalizability principle, autonomy, and what it means to treat people as ends-in-themselves, rather than as mere means. Get your own Crash Course Philosophy mug or Chom Chom shirt from DFTBA: https://store.dftba.com/collections/crashcourse The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV -- All other images and video either public domain or via VideoBlocks, or Wikimedia Commons, licensed under Creative Commons BY 4.0: https://creativecommons.org/licenses/by/4.0/ -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Crash Course Philosophy is sponsored by Squarespace. http://www.squarespace.com/crashcourse -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 840897 CrashCourse
Vision: Crash Course A&P #18
 
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Next stop in our tour of your sensory systems? VISION. With a little help from an optical illusion, we take a look inside your eyes to try to figure out how your sense of vision works -- and how it can be tricked. *** Table of Contents The Structure of the Eye 2:31 The Fibrous, Vascular, and Inner Layers 3:33.2 The Retina 4:56 Photoreceptors, Bipolar Cells, and Ganglion Neurons 5:09.2 Rods and Cones 6:07.5 *** Crash Course is now on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark Brouwer, Jan Schmid, Steve Marshall, Anna-Ester Volozh, Sandra Aft, Brad Wardell, Christian Ludvigsen, Robert Kunz, Jason, A Saslow, Jacob Ash, Jeffrey Thompson, Jessica Simmons, James Craver, Simun Niclasen, SR Foxley, Roger C. Rocha, Nevin, Spoljaric, Eric Knight, Elliot Beter, Jessica Wode ***SUBBABLE MESSAGES*** TO: THE WORLD FROM: Future Is The Future Awesome gender neutral vintage clothing: http://futureisthefuture.com -- TO: Beth FROM: Joey I Love You Beth Ronie With All Of My Heart! ***SUPPORTER THANK YOU!*** Thank you so much to all of our awesome supporters for their contributions to help make Crash Course possible and freely available for everyone forever: Sofie Harning Sour Bags & Totes Don Phillips Christian Dodson Christian Dodson (once again) Christian Dodson (again) Christian Dodson (NO EDGE) Sour Bags & Totes tuseroni Amy Guerrero -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 1272918 CrashCourse
Blood, Part 1 - True Blood: Crash Course A&P #29
 
10:00
Now that we've talked about your blood vessels, we're going to zoom in a little closer and talk about your blood itself. We'll start by outlining the basic components of blood -- including erythrocytes, leukocytes, platelets, and plasma -- as well as the basic process of hemostasis that stops bleeding, and how antigens are responsible for the blood type that you have. By the end of this episode, you should be totally prepared for your next blood drive. Table of Contents The Basic Components of Blood 2:30 Erythrocytes, Leukocytes, Platelets, and Plasma 3:00 The Basic Process of Hemostasis 4:45 How Antigens Are Responsible For Your Blood Type 6:21 *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark, Jan Schmid, Simun Niclasen, Robert Kunz, Daniel Baulig, Jason A Saslow, Eric Kitchen, Christian, Beatrice Jin, Anna-Ester Volozh, Eric Knight, Elliot Beter, Jeffrey Thompson, Ian Dundore, Stephen Lawless, Today I Found Out, James Craver, Jessica Wode, Sandra Aft, Jacob Ash, SR Foxley, Christy Huddleston, Steve Marshall, Chris Peters -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 1160832 CrashCourse
DNA Structure and Replication: Crash Course Biology #10
 
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Hank introduces us to that wondrous molecule deoxyribonucleic acid - also known as DNA - and explains how it replicates itself in our cells. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse References for this episode can be found in the Google document here: http://dft.ba/-2hCl 1:41 link to Biological Molecules http://www.youtube.com/watch?v=H8WJ2KENlK0 Table of Contents: 1) Nucleic Acids 1:30 2) DNA -A) Polymers 1:53 -B) Three Ingredients 2:12 -C) Base Pairs 3:45 -D) Base Sequences 4:13 3) Pop Quiz 5:07 4) RNA 5:36 -A) Three Differences from DNA 5:43 5) Biolography 6:16 6) Replication 8:49 -A) Helicase and Unzipping 9:22 -B) Leading Strand 9:38 -C) DNA Polymerase 10:08 -D) RNA Primase 10:24 -E) Lagging Strand 10:46 -F) Okazaki Fragments 11:07 -F) DNA Ligase 11:47 DNA, deoxyribonucleic acid, chromosome, nucleic acid, ribonucleic acid, RNA, polymer, nucleotide, double helix, nucleotide base, base pair, base sequence, friedrich miescher, rosalind franklin, replication, helicase, leading strand, lagging strand, rna primase, dna polymerase, okazaki fragment Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 5151619 CrashCourse
The Agricultural Revolution: Crash Course World History #1
 
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Crash Course World History is now available on DVD! Visit http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set to buy a set for your home or classroom. You can directly support Crash Course at https://www.patreon.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing this content. In which John Green investigates the dawn of human civilization. John looks into how people gave up hunting and gathering to become agriculturalists, and how that change has influenced the world we live in today. Also, there are some jokes about cheeseburgers. Additional reading: NIsa by Marjorie Shostak: https://goo.gl/hAPr5H First Farmers by Peter Bellwood: https://goo.gl/JqgHLW Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! ‪http://www.facebook.com/youtubecrashcourse Follow us again! ‪http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: https://www.patreon.com/crashcourse
Views: 9406603 CrashCourse
Brown Dwarfs: Crash Course Astronomy #28
 
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While Jupiter is nowhere near massive enough to initiate fusion in its core, there are even more massive objects out there that fall just short of that achievement as well called brown dwarfs. Brown dwarfs, have a mass that places them between giant planets and small stars. They were only recently discovered in the 1990’s, but thousands are now known. More massive ones can fuse deuterium, and even lithium, but not hydrogen, distinguishing them from “normal” stars. Sort of. Correction: In the illustration at 9:30, the numbers listed after the star names are the year of discovery, not distance. -- Table of Contents Intermediate in Mass 1:22 Thousands Are Known 4:48 Cannot Fuse Hydrogen Like “Normal” Stars 8:46 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow Phil on Twitter: https://twitter.com/badastronomer Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse -- PHOTOS/VIDEOS The sun in extreme ultraviolet https://en.wikipedia.org/wiki/File:The_Sun_in_extreme_ultraviolet.jpg [credit: NASA, ESA / Wikimedia Commons] Jupiter http://www.spacetelescope.org/static/archives/images/screen/heic1410a.jpg [credit: NASA, ESA, and A. Simon (Goddard Space Flight Center)] Forming a Planetary Gap http://www.spitzer.caltech.edu/video-audio/691-ssc2004-08v3-Forming-a-Planetary-Gap [credit: NASA/JPL-Caltech/R. Hurt (SSC/Caltech)] Exoplanet http://uanews.org/sites/default/files/story-images/exoplanet.jpg [credit: NASA/JPL-Caltech] A Trio of Brown Dwarfs (L/T/Y) http://www.nasa.gov/mission_pages/WISE/multimedia/pia14722.html [credit: NASA/JPL-Caltech] Artist's concept of a T-type brown dwarf https://en.wikipedia.org/wiki/Brown_dwarf#/media/File:2MASSJ22282889-431026.jpg [credit: NASA/JPL-Caltech] Brown Dwarf Gliese 229B https://en.wikipedia.org/wiki/File:Brown_Dwarf_Gliese_229B.jpg [credit: NASA / Wikimedia Commons] Gliese 229B Spectrum - image provided by Phil Plait [credit: NASA/ESA/Hubble/Al Schultz et al] Artist's vision of a T-dwarf https://en.wikipedia.org/wiki/Brown_dwarf#/media/File:T-dwarf-nasa-hurt.png [credit: R. Hurt/NASA - R. Hurt/NASA, Wikimedia Commons] First Ultra-Cool WISE Brown Dwarf http://wise.ssl.berkeley.edu/gallery_firstbd.html [credit: NASA/JPL-Caltech/WISE Team] Brown Dwarf Comparison http://www.nasa.gov/mission_pages/WISE/multimedia/pia12462.html [credit: NASA/JPL-Caltech/UCB] Storms Expected on Brown Dwarfs http://www.spitzer.caltech.edu/images/5718-sig14-001-This-Just-In-Storms-Expected-on-Brown-Dwarfs [credit: NASA/JPL-Caltech/T. Pyle (IPAC)] Stars and brown dwarfs closest to the Sun https://en.wikipedia.org/wiki/Luhman_16#/media/File:PIA18003-NASA-WISE-StarsNearSun-20140425-2.png [credit: NASA/Penn State University]
Views: 630731 CrashCourse
Autonomic Nervous System: Crash Course A&P #13
 
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Hank takes you on a tour of your two-part autonomic nervous system. This episode explains how your sympathetic nervous system and parasympathetic nervous system work together as foils, balancing each other out. Their key anatomical differences - where nerve fibers originate and where their ganglia are located - drive their distinct anatomical functions, making your sympathetic nervous system the "fight or flight" while your parasympathetic nervous system is for "resting and digesting." -- Table of Contents The Basic Two-Part System of the Autonomic Nervous System 0:48 Sympathetic Nervous System 2:33 Parasympathetic Nervous System 2:54 Their Nerve Fibers Originate in Different Parts of the Body 3:22 Sympathetic Ganglia Are Close to the Spinal Cord 4:36 Parasympathetic Ganglia Are Close to Their Effectors 4:59 *** Crash Course is now on Patreon! You can support us directly (and, until April 30th, have your contributions matched by Patreon!) by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark Brouwer, Simun Niclasen, Brad Wardell, Roger C. Rocha, Jan Schmid, Elliot Beter, Nevin Spoljaric, Sandra Aft, SR Foxley, Jessica Simmons, Stefan R. Finnerup, Jason A Saslow, Robert Kunz, Jessica Wode, Mike Drew, Steve Marshall, Anna-Ester Volozh, Christian Ludvigsen, Jeffrey Thompson, James Craver ***SUBBABLE MESSAGES*** TO: SEM Students FROM: Mrs. S You are confident and courageous! I believe in you! DFTBA! -- TO: Zachary FROM: She who gave you life! You, like the Mongols, will always be the exception. ***EPISODE CO-SPONSORS*** Link Kelly Naylor - http://www.aertenart.com Tim Webster Steven Meekel ***SUPPORTER THANK YOU!*** Thank you so much to all of our awesome supporters for their contributions to help make Crash Course possible and freely available for everyone forever: Caitlin Steinert, BryanGriffith.com, Maia McGuire, That one guy from Midland who teaches science at highschool, Michael Longwell, Justice H, Martha (splicegrrl), Casey Rule, Manuel Kovats, and @simplscientist -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 1143203 CrashCourse
Of Pentameter & Bear Baiting - Romeo & Juliet Part I: Crash Course English Literature #2
 
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In which John Green examines Romeo & Juliet by William Shakespeare. John delves into the world of Bill Shakespeare's famous star-crossed lovers and examines what the play is about, its structure, and the context in which it was written. Have you ever wanted to know what iambic pentameter is? Then you should watch this video. Have you ever pondered what kind of people actually went to see a Shakespeare play in 1598? Watch this video. Were you aware that wherefore means "why?" Whether you were or not, watch this video. In Shakespeare's time, entertainment choices ranged from taking in a play to watching a restrained bear try to fight off a pack of dogs. Today on YouTube, our entertainment choices are just as wide-ranging. So you can either choose to watch the modern equivalent of bear baiting (another cinnamon challenge) or you can be edified and entertained by John and Crash Course. So wherefore are you reading this description instead of watching the video? Follow us! @thecrashcourse @realjohngreen @crashcoursestan @saysdanica @thoughtbubbler Like us! http://www.facebook.com/youtubecrashcourse Support CrashCourse on Patreon: https://www.patreon.com/crashcourse
Views: 1388188 CrashCourse
Samurai, Daimyo, Matthew Perry, and Nationalism: Crash Course World History #34
 
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In which John Green teaches you about Nationalism. Nationalism was everywhere in the 19th century, as people all over the world carved new nation-states out of old empires. Nationalist leaders changed the way people thought of themselves and the places they lived by reinventing education, military service, and the relationship between government and governed. In Japan, the traditional feudal society underwent a long transformation over the course of about 300 years to become a modern nation-state. John follows the course of Japanese history from the emergence of the Tokugawa Shogunate to the Meiji Restoration, and covers Nationalism in many other countries along the way. All this, plus a special guest appearance, plus the return of an old friend on a extra-special episode of Crash Course. Resources: A Modern History of Japan by Andrew Gordon http://dft.ba/-GordonJapan Giving Up the Gun by Noel Perrin http://dft.ba/-PerrinGun Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! http://www.facebook.com/youtubecrashcourse Follow us again! http://thecrashcourse.tumblr.com Look at this! It's an awesome tumblog about the art you see in Crash Course: http://crashcourseart.tumblr.com Support CrashCourse on Patreon: http://patreon.com/crashcourse
Views: 2715883 CrashCourse
Buddha and Ashoka: Crash Course World History #6
 
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In which John relates a condensed history of India, post-Indus Valley Civilization. John explores Hinduism and the origins of Buddhism. He also gets into the reign of Ashoka, the Buddhist emperor who, in spite of Buddhism's structural disapproval of violence, managed to win a bunch of battles. Resources: Awesome comic book about Ashoka by Anant Pai: http://dft.ba/-ashoka He did a huge series of comics about Indian history and religion: http://dft.ba/-AnantPai India: A History by John Keay: http://dft.ba/-IndiaHistory The Bhagavad Gita: http://dft.ba/-gita The Bhagavad Gita, Upanishads, and Rig Veda, all-in-one edition: http://dft.ba/-India Credits: Executive Producer: John Green Producer: Stan Muller Writer and historian: Raoul Meyer Script Supervisor: Danica Johnson Music: Jason Weidner Thought Bubble is a product of the Smart Bubble Society: http://dft.ba/-smartbubble the Smart Bubble Society is: Suzanna Brusikiewicz Jonathon Corbiere Nick Counter Allan Levy James Tuer Adam Winnik Set Design: Donna Sink Props: Brian McCutcheon Photos: David Shankbone ClipWorks Crash Course World History is now available on DVD! http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! ‪http://www.facebook.com/youtubecrashcourse Follow us again! ‪http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: https://www.patreon.com/crashcourse
Views: 4202382 CrashCourse
Aristotle & Virtue Theory: Crash Course Philosophy #38
 
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This week we explore final ethical theory in this unit: Aristotle’s virtue theory. Hank explains the Golden Mean, and how it exists as the midpoint between vices of excess and deficiency. We’ll also discuss moral exemplars, and introduce the concept of “eudaimonia.” Get your own Crash Course Philosophy mug or Chom Chom shirt from DFTBA: https://store.dftba.com/collections/crashcourse The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Crash Course Philosophy is sponsored by Squarespace. http://www.squarespace.com/crashcourse -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 754469 CrashCourse
The Atlantic Slave Trade: Crash Course World History #24
 
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In which John Green teaches you about one of the least funny subjects in history: slavery. John investigates when and where slavery originated, how it changed over the centuries, and how Europeans and colonists in the Americas arrived at the idea that people could own other people based on skin color. Slavery has existed as long as humans have had civilization, but the Atlantic Slave Trade was the height, or depth, of dehumanizing, brutal, chattel slavery. American slavery ended less than 150 years ago. In some parts of the world, it is still going on. So how do we reconcile that with modern life? In a desperate attempt at comic relief, Boba Fett makes an appearance. Crash Course World History is now available on DVD! http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! ‪http://www.facebook.com/youtubecrashcourse Follow us again! ‪http://thecrashcourse.tumblr.com Resources: Inhuman Bondage by David Brion Davis: http://dft.ba/-inhumanbondage Up From Slavery by Booker T Washington: http://dft.ba/-upfromslavery Support Crash Course on Patreon: http://patreon.com/crashcourse
Views: 2792437 CrashCourse
What is Philosophy?: Crash Course Philosophy #1
 
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Today Hank begins to teach you about Philosophy by discussing the historical origins of philosophy in ancient Greece, and its three main divisions: metaphysics, epistemology, and value theory. He will also introduce logic, and how you’re going to use it to understand and critically evaluate a whole host of different worldviews throughout this course. And also, hopefully, the rest of your life. -- Images and video via VideoBlocks or Wikimedia Commons, licensed under Creative Commons by 4.0: https://creativecommons.org/licenses/by/4.0/ -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Crash Course Philosophy is sponsored by Squarespace. http://www.squarespace.com/crashcourse -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 2925016 CrashCourse
Coal, Steam, and The Industrial Revolution: Crash Course World History #32
 
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Mongols Shirts and Crash Course Posters! http://store.dftba.com/collections/crashcourse In which John Green wraps up revolutions month with what is arguably the most revolutionary of modern revolutions, the Industrial Revolution. While very few leaders were beheaded in the course of this one, it changed the lives of more people more dramatically than any of the political revolutions we've discussed. So, why did the Industrial Revolution happen around 1750 in the United Kingdom? Coal. Easily accessible coal, it turns out. All this, plus you'll finally learn the difference between James Watt and Thomas Newcomen, and will never again be caught telling people that your blender has a 900 Newcomen motor. Crash Course World History is now available on DVD! http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! ‪http://www.facebook.com/youtubecrashcourse Follow us again! ‪http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse
Views: 3607256 CrashCourse
Immune System, part 2: Crash Course A&P #46
 
09:44
In the penultimate episode of Crash Course Anatomy & Physiology, Hank explains your adaptive immune system. The adaptive immune system's humoral response guards extracellular terrain against pathogens. Hank also explains B cells, antibodies, and how vaccines work. Crash Course A&P Poster: http://store.dftba.com/products/crashcourse-anatomy-and-physiology-poster Table of Contents Adaptive Immune System's Humoral Response 1:19 How B Cells Mature, Identify Antigens, and Make Antibodies 2:42 How Antibodies Warm Pathogens and Mark Them for Death 5:22 Active and Passive Humoral Immunity 6:03 How Vaccines Work 6:27 *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 1268240 CrashCourse
The Norse Pantheon: Crash Course World Mythology #10
 
12:45
This week, we're headed north. To check out the gods of the Northmen. Or the Norse. That's right, we're talking Thor, Loki, Freyr, Freya, Odin, Frigg, Baldr, and Tyr. And Fenrir. And the Frost Giants. There's a lot to cover here, and it's going to be fun. Watch this prior to Ragnarok, as this video probably won't be available after the end of the universe. Crash Course is made with Adobe Creative Cloud. Try it for free here: http://www.adobe.com/creativecloud/start-with-free-creativecloud.html Our Sources: Kevin Crossley-Holland, the Norse Myths. Pantheon Books. New York. 1980 Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark, Les Aker, Bob Kunz, William McGraw, Jeffrey Thompson, Ruth Perez, Jason A Saslow, Eric Prestemon, Malcolm Callis, Steve Marshall, Advait Shinde, Rachel Bright, Ian Dundore, Tim Curwick, Ken Penttinen, Dominic Dos Santos, Caleb Weeks, Kathrin Janßen, Nathan Taylor, Yana Leonor, Andrei Krishkevich, Brian Thomas Gossett, Chris Peters, Kathy & Tim Philip, Mayumi Maeda, Eric Kitchen, SR Foxley, Justin Zingsheim, Andrea Bareis, Moritz Schmidt, Bader AlGhamdi, Jessica Wode, Daniel Baulig, Jirat -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 763458 CrashCourse
How We Make Memories - Crash Course Psychology #13
 
09:55
You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content. Remember that guy from 300? What was his name? ARG!!! It turns out our brains make and recall memories in different ways. In this episode of Crash Course Psychology, Hank talks about the way we do it, what damaging that process can do to us, and that guy... with the face and six pack... -- Table of Contents Encoding and Storing Memory 03:15:08 Implicit & Explicit Processing 04:46:03 Shallow & Deep Processing 07:27:03 Long-Term Storage 04:03:00 -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 1856485 CrashCourse
Contractarianism: Crash Course Philosophy #37
 
09:32
Today we explore the penultimate ethical theory in this unit: contractarianism. Hank explains Hobbes’ state of nature, and implicit and explicit contracts, as well as the Prisoner’s Dilemma, and the benefits, and costs, of violating contracts. Get your own Crash Course Philosophy mug or Chom Chom shirt from DFTBA: https://store.dftba.com/collections/crashcourse The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 560821 CrashCourse
Determinism vs Free Will: Crash Course Philosophy #24
 
10:26
Do we really have free will? Today Hank explores possible answers to that question, explaining theories like libertarian free will and it’s counterpoint, hard determinism. Get your own Crash Course Philosophy mug from DFTBA: http://store.dftba.com/products/crashcourse-philosophy-mug The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV -- Images via ThinkStock Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Crash Course Philosophy is sponsored by Squarespace. http://www.squarespace.com/crashcourse -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 1028132 CrashCourse
Their Eyes Were Watching God: Crash Course Literature 301
 
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In which John Green reads Zora Neale Hurston's novel, "Their Eyes Were Watching God," and talks to you about it. You'll learn about Zora Neale Hurston's life, and we'll also look at how the interpretations of the book have changed over time. Also, this book will give you a healthy appreciation for the rabies vaccine, and the terrible dilemmas you've avoided thanks to that modern development. *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks, and Sheikh Kori Rahman. -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 363559 CrashCourse
Digestive System, Part 1: Crash Course A&P #33
 
11:05
Nachos are delicious. And versatile because today they're also going to help us learn a thing or two about your digestive system. Nachos can provide us with energy and raw materials, by first ingesting something nutritious, propelling it through the alimentary canal where it will be mechanically broken down, and chemically digested by enzymes until my cells can absorb their monomers and use them to make whatever they need. And eventually, there will be pooping. Table of Contents Ingestion 6:24 Propulsion 7:00 Mechanical Breakdown 7:38 Digestion 8:01 Absorption 8:30 Defecation 8:50 *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark , Elliot Beter, Moritz Schmidt, Jeffrey Thompson, Ian Dundore, Jacob Ash, Jessica Wode, Today I Found Out, Christy Huddleston, James Craver, Chris Peters, SR Foxley, Steve Marshall, Simun Niclasen, Eric Kitchen, Robert Kunz, Avi Yashchin, Jason A Saslow, Jan Schmid, Daniel Baulig, Christian , Anna-Ester Volozh *** Episode co-sponsors: Bryan Drexler Peter Rapp, Lightbow - www.lightbow.net Sigmund Leirvåg Mikael Modin - http://www.msf.org/ Jeremy Bradley -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 1661487 CrashCourse
Ghosts, Murder, and More Murder - Hamlet Part I: Crash Course Literature 203
 
12:24
You can directly support Crash Course at https://www.patreon.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing this content. In which John Green teaches you about Hamlet, William Shakespeare's longest and most-performed play. People love Hamlet. The play that is, not necessarily the character. Hamlet is a Tragedy with a capital T (I guess I don't have to point that out, since you can see clearly in the text that the T was capitalized). By Tragedy, I mean virtually everyone dies at the end. John will talk a little bit about the history of the play and the different versions of it that have appeared in the centuries since it was written. You'll also learn about some of the big themes in the play, get a brief plot overview, and the all important connections between Prince Hamlet and Simba, the Lion King. Seriously though, The Lion King is totally just a Hamlet musical with animals instead of people.
Views: 1553420 CrashCourse
The Roaring 20's: Crash Course US History #32
 
13:12
You can directly support Crash Course at https://www.patreon.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing this content. In which John Green teaches you about the United States in the 1920s. They were known as the roaring 20s, but not because there were lions running around everywhere. In the 1920s, America's economy was booming, and all kinds of social changes were in progress. Hollywood, flappers, jazz, there was all kinds of stuff going on in the 20s. But as usual with Crash Course, things were about to take a turn for the worse. John will teach you about the Charleston, the many Republican presidents of the 1920s, laissez-faire capitalism, jazz, consumer credit, the resurgent Klan, and all kinds of other stuff. Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. The Roaring Twenties was characterized by great highs: https://www.commonlit.org/texts/the-roaring-twenties However, the Roaring Twenties ended with the country's most tragic low, the Great Depression: https://www.commonlit.org/texts/the-great-depression Follow us! @thecrashcourse @realjohngreen @crashcoursestan @raoulmeyer
Views: 2317780 CrashCourse
Slavery, Ghosts, and Beloved: Crash Course Literature 214
 
11:39
You can directly support Crash Course at https://www.patreon.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing this content. In which John Green teaches you about Beloved by Toni Morrison. I'll warn you up front, this book is something of a downer. That's because it deals with subjects like slavery, the death of a child, a potential haunting, and a bunch of other sad stuff. John will talk about Beloved in relation to slavery, and how that terrible institution affected individuals, families, and all of American culture in the years surrounding the Civil War. We will also not be getting into whether or not Beloved was a ghost, because it really has no bearing on what the book has to say. Also, as usual, spoilers abound, so we recommend you read the book before you watch this video!
Views: 487424 CrashCourse
Venice and the Ottoman Empire: Crash Course World History #19
 
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In which John Green discusses the strange and mutually beneficial relationship between a republic, the citystate of Venice, and an Empire, the Ottomans--and how studying history can help you to be a better boyfriend and/or girlfriend. Together, the Ottoman Empire and Venice grew wealthy by facilitating trade: The Venetians had ships and nautical expertise; the Ottomans had access to many of the most valuable goods in the world, especially pepper and grain. Working together across cultural and religious divides, they both become very rich, and the Ottomans became one of the most powerful political entities in the world. We also discuss how economic realities can overcome religious and political differences (in this case between Muslims and Christians), the doges of Venice, the sultans of the Ottoman empire, the janissaries and so-called slave aristocracy of the Ottoman Empire, and how money and knowledge from the Islamic world helped fuel and fund the European Renaissance. Also, there's a They Might Be Giants joke. If you really want to read about Ottoman eunuchs (warning: it's explicit), here you go: http://en.wikipedia.org/wiki/Eunuch#Ottoman_Empire Crash Course World History is now available on DVD! http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! ‪http://www.facebook.com/youtubecrashcourse Follow us again! ‪http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://patreon.com/crashcourse
Views: 2830901 CrashCourse
Introduction: Crash Course U.S. Government and Politics
 
06:47
In which Craig Benzine introduces a brand new Crash Course about U.S. Government and Politics! This course will provide you with an overview of how the government of the United States is supposed to function, and we'll get into how it actually does function. The two aren't always the same thing. We'll be learning about the branches of government, politics, elections, political parties, pizza parties, and much, much more! Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Support is provided by Voqal: http://www.voqal.org Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Instagram - http://instagram.com/thecrashcourse Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 2355691 CrashCourse
OCD & Anxiety Disorders: Crash Course Psychology #29
 
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You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content. *** Ever call someone OCD because they like to have a clean apartment? Ever tell someone you have a phobia of spiders when, in fact, they just creep you out a little? In this episode of Crash Course psychology, Hank talks about OCD and Anxiety Disorders in the hope we'll understand what people with actual OCD have to deal with as well as how torturous Anxiety Disorders and Panic Attacks can actually be. -- Table of Contents: What Defines an Anxiety Disorder 01:55:20 Symptoms of Obsessive Compulsive Disorder 02:35:07 Generalized Anxiety Disorder 04:05:18 Panic Disorder and Phobias 04:47:20 The Learning Perspective 07:38:20 The Biological Perspective 09:13:14 Don't Use OCD as a Punch Line 00:00:00 -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 3262530 CrashCourse
How to Train a Brain - Crash Course Psychology #11
 
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You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content. I'm sure you've heard of Pavlov's Bell (and I'm not talking about the Aimee Mann song), but what was Ivan Pavlov up to, exactly? And how are our brains trained? And what is a "Skinner Box"? All those questions and more are answered in today's Crash Course Psychology, in which Hank talks about some of the aspects of learning. -- Table of Contents Associative Learning 01:33:17 Behaviorist Theory 04:32:05 Classical and Operant Conditioning 03:47:01 Positive and Negative Reinforcement 07:18:22 Reinforcement Scheduling 09:32:02 -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 2036532 CrashCourse
Gilded Age Politics:Crash Course US History #26
 
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You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps keep the channel producing great content. In which John Green teaches you about the Gilded Age and its politics. What, you may ask, is the Gilded Age? The term comes from a book by Mark Twain and Charles Dudley Warner titled, "The Gilded Age." You may see a pattern emerging here. It started in the 1870s and continued on until the turn of the 20th century. The era is called Gilded because of the massive inequality that existed in the United States. Gilded Age politics were marked by a number of phenomenons, most of them having to do with corruption. On the local and state level, political machines wielded enormous power. John gets into details about the most famous political machine, Tammany Hall. Tammany Hall ran New York City for a long, long time, notably under Boss Tweed. Graft, kickbacks, and voter fraud were rampant, but not just at the local level. Ulysses S. Grant ran one of the most scandalous presidential administrations in U.S. history, and John will tell you about two of the best known scandals, the Credit Mobilier scandal and the Whiskey Ring. There were a few attempts at reform during this time, notably the Civil Service Act of 1883 and the Sherman Anti-trust act of 1890. John will also get into the Grange Movement of the western farmers, and the Populist Party that arose from that movement. The Populists, who threw in their lot with William Jennings Bryan, never managed to get it together and win a presidency, and they faded after 1896. Which brings us to the Progressive Era, which we'll get into next week! Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. The Gilded Age was marked by the success of the richest coupled with inequality and corruption. Repeated factory disasters, such as the triangle shirtwaist factory fire revealed the unsafe working conditions of the urban poor: https://www.commonlit.org/texts/the-triangle-shirtwaist-factory-fire Meanwhile, workers began to join unions and strike for better working conditions: https://www.commonlit.org/texts/the-coeur-d-alene-miners-uprising Like us: facebook.com/youtubecrashcourse Follow Us! @TheCrashCourse @realjohngreen @crashcoursestan @raoulmeyer @thoughtbubbler @br8dybrunch
Views: 1711721 CrashCourse
The Ideal Gas Law: Crash Course Chemistry #12
 
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Gases are everywhere, and this is good news and bad news for chemists. The good news: when they are behaving themselves, it's extremely easy to describe their behavior theoretically, experimentally and mathematically. The bad news is they almost never behave themselves. In this episode of Crash Course Chemistry, Hank tells how the work of some amazing thinkers combined to produce the Ideal Gas Law, how none of those people were Robert Boyle, and how the ideal gas equation allows you to find out pressure, volume, temperature or number of moles. You'll also get a quick introduction to a few jargon-y phrases to help you sound like you know what you're talking about. Table of Contents Ideal Gas Law Equation 0:50 Everyone But Robert Boyle 1:35 Ideal Gas Law to Figure Out Things 6:16 Jargon Fun Time 7:46 Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 1271687 CrashCourse
The Excretory System: From Your Heart to the Toilet -  CrashCourse Biology #29
 
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Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse References http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookexcret.html http://www.khanacademy.org/science/biology/v/the-kidney-and-nephron Campbell Biology, 9th ed. Table of Contents 1) Homeostasis & Osmoregulation 00:00 2) Urea & Uric Acid 01:30 3) Kidneys 02:49 4) Nephron 03:40 5) Glomerulus 4:15 6) Bowman's Capsule 04:25 7) Proximal Convoluted Tubule 04:49 8) Biolography 06:16 9) Loop of Henle 07:36 10) Distal Convoluted Tubule 09:23 11) Collecting Ducts 09:57 12) Ureters, Bladder & Urethra 10:45 crashcourse, crash course, biology, science, human, anatomy, physiology, homeostasis, organ, urine, urinary, kidney, ureter, bladder, urethra, osmoregulation, balance, metabolism, ammonia, urea, uric acid, toxicity, blood, nephron, renal artery, glomerulus, bowman's capsule, filtrate, loop of henle, renal cortex, renal medulla, freidrich henle, diuretic, anti-diuretic hormone, kangaroo rat, beaver, pee, osmosis Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 1071787 CrashCourse
Globalization I - The Upside: Crash Course World History #41
 
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In which John Green teaches you about globalization, a subject so epic, so, um, global, it requires two videos. In this video, John follows the surprisingly complex path of t-shirt as it criss-crosses the world before coming to rest on your doorstep, and eventually in your dresser. (Unless you're one of those people who never puts their laundry away and lives out of a laundry basket. If that's the case, shame on you.) Anyway, the story of the t-shirt and its manufacture in far-flung places like China, Guatemala, and India is a microcosm of what's going on in the global economy. Globalization is a bit of a mixed bag, and there have definitely been winners and losers along the way. In this episode John will talk about some of the benefits that have come along with it. Next week, he'll get into some of the less-positive side effects of globalization. Also, you should turn on the captions. Thanks to Destin from Smarter Every Day for the cotton footage! http://www.youtube.com/destinws2 Crash Course World History is now available on DVD! http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set Follow us! @thecrashcourse @johngreen @crashcoursestan @raoulmeyer @saysdanica @thoughtbubbler Like us! http://www.facebook.com/youtubecrashcourse Support Crash Course on Patreon: http://patreon.com/crashcourse
Views: 2482494 CrashCourse
Indus Valley Civilization: Crash Course World History #2
 
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In which John Green teaches you about the Indus Valley Civilization, one of the largest of the ancient civilizations. John teaches you the who, how, when, where and why of the Indus Valley Civilization, and dispenses advice on how to be more successful in your romantic relationships. Additional Resources: Empires of the Indus - https://goo.gl/NoYqkY Indus Valley on Wikipedia - https://goo.gl/9a8JUK Lots of Indus Valley Civ. photos - https://goo.gl/lo9ehY Crash Course World History is now available on DVD! http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set Follow us! @thecrashcourse @realjohngreen @raoulmeyer @crashcoursestan @saysdanica @thoughtbubbler Like us! ‪http://www.facebook.com/youtubecrashcourse Follow us again! ‪http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: https://www.patreon.com/crashcourse
Views: 4857952 CrashCourse
Luther and the Protestant Reformation: Crash Course World History #218
 
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In which John Green teaches you about the Protestant Reformation. Prior to the Protestant Reformation, pretty much everyone in Europe was a Roman Catholic. Not to get all great man, but Martin Luther changed all that. Martin Luther didn't like the corruption he saw in the church, especially the sale of indulgences, so he left the church and started his own. And it caught on! And it really did kind of change the world. The changes increased literacy and education, and some even say the Protestant Reformation was the beginning of Capitalism in Europe. Get the new Crash Course World History Character poster here: http://store.dftba.com/products/crashcourse-characters-poster You can directly support Crash Course at https://www.patreon.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing this content.
Views: 2671983 CrashCourse
Bureaucracy Basics: Crash Course Government and Politics #15
 
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This week Craig Benzine discuses bureaucracies. Bureaucracies tend to be associated with unintelligible rules and time-wasting procedures, but they play an important, though controversial, role in governing. From the FDA to the EPA, these agencies were established to help the government manage and carry out laws much more efficiently - to bring the rule making and enforcement closer to the experts. But the federal bureaucracy (which is part of the executive branch) has a lot of power and sometimes acts likes Congress in creating regulations and like the courts through administrative adjudications. It's all a bit problematic for that whole "separation of powers" thing. So we'll talk about that too, and the arguments for and against increased federal bureaucracy. Support is provided by Voqal: http://www.voqal.org -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 559321 CrashCourse
The Cold War: Crash Course US History #37
 
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Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at https://www.patreon.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing this content. In which John Green teaches you about the Cold War, which was the decades long conflict between the USA and the USSR. The Cold War was called cold because of the lack of actual fighting, but this is inaccurate. There was plenty of fighting, from Korea to Viet Nam to Afghanistan, but we'll get into that stuff next week. This week we'll talk about how the Cold War started. In short it grew out of World War II. Basically, the Soviets occupied eastern Europe, and the US supported western Europe. This setup would spill across the world, with client states on both sides. It's all in the video. You should just watch it. Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. The Cold War spanned over four decades of American history, beginning with the paranoia of McCarthyism, a political witch hunt for communists: https://www.commonlit.org/texts/mccarthyism President Kennedy delivered an Inaugural Address during the height of the Cold War, initiating a space race: https://www.commonlit.org/texts/president-kennedy-s-inaugural-address President Kennedy also oversaw Cuba's emergence as a Cold War rival of the United States: https://www.commonlit.org/texts/cold-war-rivals-cuba-and-the-united-states
Views: 2697851 CrashCourse