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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.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/3d4eyZoDownload it here for Android Devices: https://bit.ly/2SrDulJChapters:Introduction: The Heart 00:00Structure of the Heart 1:41The Heart's Ventricles, Atria, and Valves 3:25Arteries & Veins 4:35Pulmonary Circulation Loop 5:04Systemic Loop 6:14Systolic and Diastolic Blood Pressure 7:58Review 8:59Credits 9:29***Crash Course is now on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourseThanks 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 StudentFROM: EarleCheck out www.youtube.com/amorsciendi for supplementary content.--TO: EveryoneFROM: Magnus KrokstadKeep 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/YouTubeCrashCourseTwitter - http://www.twitter.com/TheCrashCourseTumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourseCC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices
