Imagine your heart as a tiny superhero living in your chest — about the size of your fist! It’s a super-strong muscle that never takes a nap. Instead of a cape, it has a very important job: it pumps blood and sends it zooming through twisty tubes called blood vessels.
The blood is like cars on a road or juice in a straw, and your heart is the pump that keeps them moving. It goes “boom-boom” all day so you can run, play, and laugh. Want to meet your superhero? Put two fingers on your wrist or chest and you might feel its drumbeat — pretty cool, right?