Acclaimed science writer Seymour Simon brings you this indispensable guide that takes you through the heart, from atrium to capillary and back again.

By the time you finish reading these words, your heart may have beaten up to 50 times. As you walk, eat, and sleep, your heart continually pumps trillions of blood cells through thousands of miles of blood vessels inside your body. You may not be able to see your own heart, but all you have to do is look inside this book to see how this amazing organ works.

With clear, simple text and stunning full-color photographs, readers will learn all about our hearts and how they work in this informative picture book.

Perfect for young scientists' school reports, this book supports the Common Core State Standards.

Check out these other Seymour Simon books about the body:

The BrainLungsBonesEyes and EarsGutsMuscles