Lub-dub, lub-dub, lub-dub, that's usually the sound of a happy heart. But what's responsible for that steady, comforting beat, and what if your heart doesn't sound like that?
WHAT'S INSIDE: HUMAN BODY
- Body Parts
- Body Systems
No one is perfect, but sometimes, we go above and beyond to hide our flaws. Is your No. 1 insecurity on our list?
It happens more often than you may think. Sometimes a baby is born with organs outside of his or her body and has a slim chance of survival. What causes this?