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. Glossary of key words Index Table of contents Our bodies are super machines that keep us moving, learning, and having fun. But how do they work? The secret is inside! Explore different body systems, what they do for us, and how to keep them healthy. Each book pairs colorful illustrations and photographs with engaging text and fun facts

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