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Explore Peripheral Nervous System: Crash Course Anatomy & Physiology #12 with 3,479,530 views, 34,389 likes, and 553 comments. Experience the impact of this video content that has captured audience attention.

It is now time to meet the system that helps your brain stay in touch with the outside world. We follow up last week's tour of the central nervous system with a look at your peripheral nervous system, its afferent and efferent divisions, how it processes information, the reflex arc, and what your brain has to say about pain. 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: Peripheral Nervous System 00:00 Sensory Nerve Receptors: Thermoreceptors, Photoreceptors, Chemoreceptors, Mechanoreceptors, and Nociceptors 0:56 What is Pain? 1:54 How Pain is Processed 2:51 Pain Threshold vs Pain Tolerance 3:50 How the Brain Processes Pain 4:25 Afferent and Efferent Divisions 5:42 Five Steps of the Reflex Arc 6:38 What the Brain Says About Pain 8:09 Review 9:09 Credits 9:39 *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids ***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: Dan Rajan Josh Greenberg @wordlessrage Tanmay Sheth Chriztopher North Teodora Miclaus Jessica Baker Julie Anne Mathieu Moti Lieberman Leanne Gover www.justplainsomething.com

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