WHAT'S INSIDE: HUMAN BODY
- Body Parts
- Body Systems
But no matter how many times you've doodled one on a piece of paper or touched your chest when expressing affection for someone, there's probably a lot you don't know about it. So what are five things you don't know about your heart?
Despite what people say, the tongue isn't your body's strongest muscle. But you do depend on it for eating, tasting and speaking.