Top videos
Today, Hank answers the question, "Why do we use lotion?" We'll take a look at your integumentary system and all the hard work it does to protect you from and help you interact with the world around you.
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
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Chapters:
Introduction: Why Do We Use Lotion? 00:00
Protective & Sensory Functions of the Integumentary System 1:23
More Functions: removing waste, storing blood, and regulating body temperature 2:16
Skin Discoloration: Cyanosis, Jaundice, and Erythema 3:46
Melanin, Vitamin D, and Skin Tone 4:39
How Does Hair Conditioner Work? 5:40
How Do Hair, Skin, and Nails Grow? 6:17
Types of Sweat Glands: Eccrine, Apocrine, Mammary, and Ceruminous 6:55
Sebaceous (Oil) Glands 8:17
Review 9:05
Credits 9:33
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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.
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
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Chapters:
Introduction: Adaptive Immune Responses 00:00
How B Cells Identify Antigens 2:14
B Cells Become Effector Cells & Memory Cells 4:05
How Antibodies Fight Antigens 5:22
Active and Passive Humoral Immunity 6:03
How Vaccines Work 6:27
Review 8:30
***
Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse
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Why do we sleep? Well... that's a tricky question. More easily answered is the question, "How do we sleep?" In this episode of Crash Course Psychology, Hank discusses some of the ways our brain functions when sleeping and how it can malfunction as well.
Want more videos about psychology? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych!
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Chapters:
Introduction: What Happens When We're Sleeping? 00:00
What is sleep and why do we do it? 1:20
How do we sleep? 1:56
Rapid Eye Movement (REM) 2:38
4 Stages of Sleep 3:08
Sleep Deprivation 4:28
Sleep Disorders 4:47
What do we dream about? 6:08
Why do we dream? 7:26
Review & Credits 9:46
--
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You're already learning on YouTube โ why not get college credit for it? https://link.gostudyhall.com/my1
Choosing majors can feel overwhelming and even confusing. It can feel like your whole life can be based on this one choice? And then what happens if you figure out you don't even like this major? Well, don't worry, we're here to help. In this episode, Erica talks to us about what majors are, how to choose one, and how to know if you should consider changing your major.
***
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Chapters:
0:00 - Introduction
2:06 - How majors work
3:53 - Selecting classes and balancing your time
6:00 - How and when to declare a major
8:24 - Resources to help you choose a major
_______________________________________________
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Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse
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Dave Freeman, Hasan Jamal, DL Singfield, Lisa Owen, Jeremy Mysliwiec, Amelia Ryczek, Ken Davidian, Stephen Akuffo, Toni Miles, Erin Switzer, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel Stevens, Vincent, Michael Wang, Stacey Gillespie (Stacey J), Alexis B, Burt Humburg, Aziz Y, Shanta, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Rachel Creager, Breanna Bosso, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, team dorsey, Trevin Beattie, Divonne Holmes ร Court, Eric Koslow, Jennifer, Dineen, Indika Siriwardena, Khaled El Shalakany, Jason Rostoker, Shawn Arnold, Siobhรกn, Ken Penttinen, Nathan Taylor, Les Aker, ClareG, Rizwan Kassim, Alex Hackman, Jirat, Katie Dean, Avi Yashchin, NileMatotle, Wai Jack Sin, Ian Dundore, Justin, Mark, Caleb Weeks
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#CrashCourse #HowtoCollege #StudyHall
***
Weathering breaks down rocks and creates sediments which become the raw materials for other rocks and the formation of our soils. And we call the process of moving that sediment erosion. In today's episode, we're just going to focus on the weathering part. We'll discuss mechanical, chemical, and biological weathering and take you on a tour of some of the landscapes they help shape from landslides and sinkholes to caves!
Watch our videos and review your learning with the Crash Course App!
Download here for Apple Devices: https://apple.co/3d4eyZo
Download here for Android Devices: https://bit.ly/2SrDulJ
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:
Toni Miles, Oscar Pinto-Reyes, Erin Nicole, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel A Stevens, Evan Lawrence Henderson, Vincent, Michael Wang, Krystle Young, Michael Dowling, Alexis B, Rene Duedam, Burt Humburg, Aziz, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, JJurong, Eric Zhu, Alan Bridgeman, Rachel Creager, Jennifer Smith, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, Brandon Westmoreland, team dorsey, Trevin Beattie, Divonne Holmes ร Court, Eric Koslow, Jennifer Dineen, Indika Siriwardena, Khaled El Shalakany, Jason Rostoker, Shawn Arnold, Siobhรกn, Ken Penttinen, Nathan Taylor, William McGraw, Andrei Krishkevich, ThatAmericanClare, Rizwan Kassim, Sam Ferguson, Alex Hackman, Eric Prestemon, Jirat, Katie Dean, TheDaemonCatJr, Wai Jack Sin, Ian Dundore, Matthew, Justin, Jessica Wode, Mark, Caleb Weeks
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#CrashCourse #Geography #Weathering
Today we are introducing a new area of philosophy โ philosophy of religion. We are starting this unit off with Anselmโs argument for Godโs existence, while also considering objections to that argument.
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โThatโs a Neighโ David Goehring https://www.flickr.com/photos/carbonnyc/8757020626
All other images via 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.
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e=mc2... it's a big deal, right? But why? And what about this grumpy cat in a box and probability? In this episode of Crash Course Physics, Shini attempts to explain a little more on the topic of quantum mechanics.
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In the second half of our look at the endocrine system, Hank discusses chemical homeostasis and hormone cascades. Specifically, he looks at the hypothalamus-pituitary-thyroid axis, or HPT axis, and all the ways your body can suffer when that system, or your hormones in general, get out of whack.
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ
Chapters:
Introduction: Graves Disease & Hyperthyroidism 00:00
Hormone Cascades 2:35
Hypothalamus-Pituitary-Thyroid (HPT) Axis 3:25
Thyroid Disorders & Autoimmune Dysfunction 6:37
Review 8:21
Credits 8:57
***
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***SUPPORTER THANK YOU!***
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In the 1920s, there was a blossoming of all kinds of art made by African Americans in the New York neighborhood Harlem. Let's call it a renaissance. While all the arts were having a great run, some extremely interesting things were happening in the theater. Writers like Langston Hughes and Zora Neale Hurston were writing plays, and black theater companies were drawing larger audiences than ever before.
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:
Sam Buck, Mark Brouwer, Jennifer French Lee, Brandon Westmoreland, dorsey, Indika Siriwardena, James Hughes, Kenneth F Penttinen, Trevin Beattie, Satya Ridhima Parvathaneni, Erika & Alexa Saur, Glenn Elliott, Justin Zingsheim, Jessica Wode, Eric Prestemon, Kathrin Benoit, Tom Trval, Jason Saslow, Nathan Taylor, Brian Thomas Gossett, Khaled El Shalakany, SR Foxley, Sam Ferguson, Yasenia Cruz, Eric Koslow, Caleb Weeks, Tim Curwick, D.A. Noe, Shawn Arnold, Malcolm Callis, Advait Shinde, William McGraw, Andrei Krishkevich, Rachel Bright, Kathy & Tim Philip, Jirat, Ian Dundore
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On today's episode of Crash Course Anatomy & Physiology, Hank continues our exploration of tissues, with an introduction to your connective tissues.
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ
Chapters:
Introduction 00:00
What is Connective Tissue? 2:14
Four Classes of Connective Tissue 2:34
What Makes Connective Tissues Different From Other Tissue Types? 3:25
The Extracellular Matrix 4:07
Types of Fibers 5:34
Connective Tissue Cells 6:34
How Marfan Syndrome Affects Connective Tissue 8:31
Review 9:37
Credits 10:08
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Weathering breaks down rocks and creates sediments which become the raw materials for other rocks and the formation of our soils. And we call the process of moving that sediment erosion. In today's episode, we're just going to focus on the weathering part. We'll discuss mechanical, chemical, and biological weathering and take you on a tour of some of the landscapes they help shape from landslides and sinkholes to caves!
Watch our videos and review your learning with the Crash Course App!
Download here for Apple Devices: https://apple.co/3d4eyZo
Download here for Android Devices: https://bit.ly/2SrDulJ
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:
Toni Miles, Oscar Pinto-Reyes, Erin Nicole, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel A Stevens, Evan Lawrence Henderson, Vincent, Michael Wang, Krystle Young, Michael Dowling, Alexis B, Rene Duedam, Burt Humburg, Aziz, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, JJurong, Eric Zhu, Alan Bridgeman, Rachel Creager, Jennifer Smith, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, Brandon Westmoreland, team dorsey, Trevin Beattie, Divonne Holmes ร Court, Eric Koslow, Jennifer Dineen, Indika Siriwardena, Khaled El Shalakany, Jason Rostoker, Shawn Arnold, Siobhรกn, Ken Penttinen, Nathan Taylor, William McGraw, Andrei Krishkevich, ThatAmericanClare, Rizwan Kassim, Sam Ferguson, Alex Hackman, Eric Prestemon, Jirat, Katie Dean, TheDaemonCatJr, Wai Jack Sin, Ian Dundore, Matthew, Justin, Jessica Wode, Mark, Caleb Weeks
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#CrashCourse #Geography #Weathering
Over the millennia, every region on Earth has developed its own successful agricultural ecosystem from flat fields of grain and mountainside rice terraces to coastal fish farms and goat herding. Today, weโre going to break down agricultural systems into three scales: subsistence, small-scale, and industrial agriculture. And weโll take a look at how a place's history plays a huge role in the system we see today as we follow the story of agriculture in the Philippines.
SOURCES
Philippines
Davila, F. (2018). Human Ecology and Food Systems: Insights from the Philippines. Human Ecology Review, 24(1), 23โ50. https://www.jstor.org/stable/26506660
Theresa Ventura. (2016). From Small Farms to Progressive Plantations: The Trajectory of Land Reform in the American Colonial Philippines, 1900โ1916. Agricultural History, 90(4), 459โ483. https://www.jstor.org/stable/1....0.3098/ah.2016.090.4
The development and agriculture paradigms transformed: Reflections from the small-scale organic rice fields of the Philippines Robin Broad &
John Cavanagh https://www.tandfonline.com/do....i/full/10.1080/03066 ย
Colonial history
https://en.wikipedia.org/wiki/....History_of_the_Phili
asianstudies.org/publications/eaa/archives/the-philippines-an-overview-of-the-colonial-era/
Agribusiness
http://asianfarmers.org/afares....earches0876dlsj/2009
https://ifranchise.ph/multinational-companies/
Age of Farmers
https://philjournalsci.dost.go....v.ph/images/pdf/pjs_
https://cebudailynews.inquirer.....net/191635/declinin
Land Tenure
https://cadasta.org/resources/....white-papers/strengt
https://www.aljazeera.com/news..../2008/3/28/asian-ric
https://www.aljazeera.com/econ....omy/2019/12/30/growi
Climate Change
https://theconversation.com/in....-philippines-climate
https://www.bbc.com/future/bes....poke/follow-the-food
https://www.bbc.com/news/scien....ce-environment-45828
https://www.irri.org/climate-change-ready-rice
Agroecology
Altieri, M.A., Funes-Monzote, F.R. & Petersen, P. Agroecologically efficient agricultural systems for smallholder farmers: contributions to food sovereignty. Agron. Sustain. Dev. 32, 1โ13 (2012). https://doi.org/10.1007/s13593-011-0065-6 https://link.springer.com/arti....cle/10.1007%2Fs13593
http://safsc.org.za/wp-content..../uploads/2015/09/Agr
Agroecology โ writ large; https://link.springer.com/chap....ter/10.1007/978-94-0
Eric Holt-Gimรฉnez & Miguel A. Altieri (2013) Agroecology, Food Sovereignty, and the New Green Revolution, Agroecology and Sustainable Food Systems, 37:1, 90-102, DOI: 10.1080/10440046.2012.716388
http://safsc.org.za/wp-content..../uploads/2015/09/Agr
Water Footprint
https://foodprint.org/issues/t....he-water-footprint-o
https://www.fao.org/3/ap527e/ap527e.pdf
Watch our videos and review your learning with the Crash Course App!
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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:
Dave Freeman, Hasan Jamal, DL Singfield, Lisa Owen, Jeremy Mysliwiec, Shannon McCone, Amelia Ryczek, Ken Davidian, Stephen Akuffo, Toni Miles, Erin Switzer, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel Stevens, Vincent, Michael Wang, Stacey Gillespie (Stacey J), Jaime Willis, Alexis B, Burt Humburg, Aziz Y, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Rachel Creager, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, Brandon Westmoreland, team dorsey, Trevin Beattie, Divonne Holmes ร Court, Eric Koslow, Jennifer Dineen, Indika Siriwardena, Khaled El Shalakany, Jason Rostoker, Shawn Arnold, Siobhรกn, Ken Penttinen, Nathan Taylor, Les Aker, William McGraw, ThatAmericanClare, Rizwan Kassim, Sam Ferguson, Alex Hackman, Jirat, Katie Dean, Avi Yashchin, NileMatotle, Wai Jack Sin, Ian Dundore, Justin, Mark, Caleb Weeks
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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 youโre 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.
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Why do people sometimes do bad things just because someone else told them to? And what does the term Groupthink mean?ย In today's episode of Crash Course Psychology, Hank talks about the ideas of Social Influence and how it can affect our decisions to act or to not act.
Want more videos about psychology? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych!
--
Chapters:
Introduction 00:00
Milgram's Obedience Experiment 0:31
Social Influence & Conformity 3:22
Asch's Conformity Experiment 4:08
Cultural Expectations & Normative Social Influence 5:21
Social Facilitation 5:59
Social Loafing 6:19
Deindividuation & Group Polarization 6:51
Groupthink 7:58
Review & Credits 9:06
--
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What is social deviance? Who defines what is deviant and how to people come to behave that way? Today weโre going to explore biological and psychological approaches to explaining deviance, including what each perspective can bring to the table, and their inherent limitations. From there, weโll explain the sociological perspective and the social foundations of deviance.
Crash Course is made with Adobe Creative Cloud. Get a free trial here: https://www.adobe.com/creativecloud.html
***
Sunflower student movement in Taiwan by Artemas Liu https://www.flickr.com/photos/....48144725@N02/1376431 (CC BY 2.0)
***
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Today Hank gains insight from that most philosophical of figures...Leonardo DiCaprio. In this episode, weโre talking about the process of philosophical discovery and questioning the relationship between appearance and reality by taking a look at Platoโs famous Myth of the Cave. All with a little help from our good pal Leo.
--
Images and video via VideoBlocks or Wikimedia Commons, licensed under Creative Commons by 4.0: https://creativecommons.org/licenses/by/4.0/
"Inception" stills copyright 2010 Warner Bros. Entertainment Inc. and Legendary Pictures
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In order to understand the history of media literacy we have to go all the way back to straight up literacy. In the first half of our look at the history of media literacy, Jay takes us all the way back to Ancient Greece and forward through the printing press, newspapers, and Yellow Journalism.
***
Resources & References:
The Impact of the Printing Press http://courses.educ.ubc.ca/ete....c540/Sept04/arthurp/
Grandparents of Media Literacy https://www.grandparentsofmedi....aliteracy.com/grandp
Maine Explosion Caused by Bomb or Torpedo? https://digitalcollections.nyp....l.org/items/84ea964f
***
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Did you know that centrifugal force isn't really a thing? I mean, it's a thing, it's just not real. In fact, physicists call it a "fictitious force." Mind blown yet? To explore this idea further, this week Shini sits down with us to discuss centripetal force, centrifugal force, and a few other bits of physics to help us understand uniform circular motion.
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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
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Our exploration of ethical theories continues with another theistic answer to the grounding problem: natural law theory. Thomas Aquinasโs version of this theory says that we all seek out whatโs known as the basic goods and argued that instinct and reason come together to point us to the natural law. There are, of course, objections to this theory โ in particular, the is-ought problem advanced by David Hume.
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Today, Craig is going to talk about something you fans out there have been demanding for months - money in politics. Specifically, we're going to talk about special interest groups and their role in the U.S. political system. Special interest groups are groups of individuals that make policy-related appeals to government - like the NRA, AARP, or the U.S. Chamber of Commerce. It's all pretty controversial, as money plays an important role in the policies and people these groups influence, so we'll bring in the clones to argue for and against them.
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