Publisher description for The heart : our circulatory system / Seymour Simon.

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The heart is a most incredible pump. About the size of a fist and weighing only about as much as one of your sneakers, in an average lifetime a heart will beat over two thousand million times without stopping for rest or repair. The heart pushes a stream of blood through sixty thousand miles of arteries, capillaries, and veins, a journey that carries nutrients and oxygen to every cell in your body.

In stunning photographs that will amaze you with their beauty and color, you will also learn about bacteria-eating white blood cells, blood-clotting platelets, and the spongy marrow tissue, where every second three million red blood cells are made.

In The Heart, award-winning author Seymour Simon begins an exciting series that explores one of the most amazing mysteries in the universe- the human body. join him on a journey as strange and wonderful as any voyage to the stars.

Library of Congress subject headings for this publication: Heart Physiology Juvenile literature, Circulatory system, Heart