Have you ever crashed your bike and torn up your knee? Or have you been hit in the face by a ball and gotten a big shiny bruise around your eye? Have any of your scabs ever oozed with gross-looking pus? Blood, bruises, and scabs are all part of your body's healing process. But sometimes you need a little extra help - from stitches, staples, or maybe even maggots and leeches! Hey, people do crazy things. Learn how your body repairs itself and what happens when something goes wrong, like getting gangrene (eew!). With lots of disgusting facts, this book tells all about the gross science behind your body's functions.