Search Results: "Epiglottis"

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• 11:53 Popular

  The Digestive System: CrashCourse Biology #28

  1,076 views / 6 likes - added 9 years ago

  Hank takes us through the bowels of the human digestive system and explains why it's all about surface area. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like Crash Course? http://www.facebook.com/youtubecrashcourse Follow Crash Cours

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