From earwax and bad breath to boogers and burps, the human body is a disgusting place. Learn about your body's sticky, smelly functions that help you stay healthy.

Take a tour of the ugly, smelly, and nasty with the World’s Grossest series—part of the UpDog BooksTM collection. You’ll learn the world’s most revolting facts about history, animals, human bodies, and more. Check out each book’s disgusting diagram and compare icky topics to decide which is grosser.