What If We Swallow Chewing Gum | What Happens If We Swallow Chewing Gum | Bubble Gum | Facts About Chewing Gum | Effects Of Swallowing Bubble Gum | When We Swallow... Read more »
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... Read more »
