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 oxygen to the rest of your body and takes out the trash. And that's just the beginning! Explore what's inside you with fun text, bright pictures, and lively illustrations.

What happens when you take a deep breathe? Woosh! Air rushes into your lungs. Your lungs help you get the air you need to live. They work with your heart to send oxygen around your body and get rid of waste you don't want. And that's not all! Explore what's inside you with fun text, bright pictures, and lively illustrations.