What is that thing pumping in your chest to help you run, dance, play, and live your life? Thump-thump, thump-thump. It's your heart! With every beat, your heart pumps blood through your body to help you keep going. It sends out oxygen and takes out the trash. And that's just the beginning! Explore what's inside you with fun text, bright pictures, and lively illustrations.

Includes index.

The inside scoop -- Pumping power -- Heart parts -- The value of valves -- Heart at work -- Heart helpers -- Keeping it clean -- Move for a happy heart -- Eating for health -- Your busy body.