The movement of the blood through the heart and around the body is called circulation and the heart takes less than 60 seconds to pump blood to every cell in your body. Blood delivers oxygen to all the body‘s cells and without oxygen these cells would die. The heart is sort of a double pump, which circulates blood around the body to provide the oxygen and nutrients the body needs, while carrying away the waste. The left side of the heart receives oxygen – rich blood from the lungs and pumps it out to every part of the body.
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http://www.wonderwhizkids.com/index.php/heart
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http://www.wonderwhizkids.com/index.php/heart
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