The Heart: Our Circulatory System

The Heart: Our Circulatory System

by Seymour Simon


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Join award-winning science writer Seymour Simon as he investigates one of the body’s most important organs: the heart

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 Brain
  • Lungs
  • Bones
  • Eyes and Ears
  • Guts
  • Muscles

Product Details

ISBN-13: 9780060877217
Publisher: HarperCollins Publishers
Publication date: 05/23/2006
Pages: 32
Sales rank: 398,042
Product dimensions: 10.00(w) x 10.00(h) x (d)
Age Range: 6 - 10 Years

About the Author

Seymour Simon has been called “the dean of the [children’s science book] field” by the New York Times. He has written more than 300 books for young readers and has received the American Association for the Advancement of Science/Subaru Lifetime Achievement Award for his lasting contribution to children’s science literature, the Science Books & Films Key Award for Excellence in Science Books, the Empire State Award for excellence in literature for young people, and the Educational Paperback Association Jeremiah Ludington Award. He and his wife, Liz, live in Columbia County in Upstate New York. You can visit him online at, where students can post on the “Seymour Science Blog” and educators can download a free four-page teacher guide to accompany this book, putting it in context with Common Core objectives. Join the growing legion of @seymoursimon fans on Twitter!

Read an Excerpt

Make a fist. This is about the size of your heart. Sixty to one hundred times every minute your heart muscles squeeze together and push blood around your body through tubes called blood vessels.

Try squeezing a rubber ball with your hand. Squeeze it hard once a second. Your hand will get tired in a minute or two. Yet your heart beats every second of every day. In one year your heart beats more than thirty million times. In an average lifetime a heart will beat over 2,000,000,000 (two thousand million) times.

The heart works hard when we relax or sleep and even harder when we work or exercise. It never stops for rest or repair. The heart is a most incredible pump.

Not all animals have hearts. There are tiny creatures in oceans and ponds that take in food and oxygen from the surrounding waters. But in humans and other mammals, most of the cells lie too deep within the body to get food and oxygen directly from the outside.

The human body is made up of hundreds of billions of microscopic cells. Your muscles, nerves, skin, and bones are all made of different kinds of cells. But every cell in your body needs food and oxygen, and your cells also need to be protected against germs that can cause disease.

Your heart, blood vessels, and blood work together to supply each of your cells with all of its needs. Every minute, the heart pushes a pulsing stream of blood through a network of blood vessels to every cell in your body. The constantly moving blood brings food and oxygen to each cell, carries away such wastes as carbon dioxide, and serves as an important component in the body's immune system. The heart, blood, and web of blood vessels make up your circulatory system.

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Heart 4.5 out of 5 based on 0 ratings. 4 reviews.
lakertraw on LibraryThing More than 1 year ago
This is an excellent book to go along with a science lesson. It talkes about the heart and its functions. It also covers blood, blood cells, arteries, veins, and other parts of the heart.
Anonymous More than 1 year ago
MadameKiki More than 1 year ago
Having had a stroke that was caused by heart fibrilation I was eager to learn more about heart function. Most adult references were too complicated, so I resorted to a paperback that is meant for young reader understanding. It is in the youth reader files but was just what I wanted, simply put for general knowledge. CCoit
Anonymous More than 1 year ago
This book is about the human body heart. If you are interested in the heart you should read this book. It tells about how the heart works. This book also tells about how the heart makes blood flow, and how people get strokes and heart attacks. It also talks about how your heart will speed up; slow down, how strong it is and how big it is. You can learn about arteries and veins also. There are many awesome photographs of how your heart looks. It even says about how many times your heart beats a year, a day, and a minute. This book also talks about many more! If you are interested in the heart you should read this book. By: Jared