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What Are Fun Facts About The Circulatory System?

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About 8 million blood cells die in the human body every second, and the same number are born each second.
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The circulatory system has three main parts; the heart,your blood vessels, and your ______?
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The circulatory system is very interesting and profound. In one drop of blood there are 5 million red blood cells! Your heart beats around 3 billion times in the average life. Also, it's also known as the cardiovascular system. Enjoy!
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A young person has a gallon of blood while an adult has 5 quarts(1 1/4 gallon)
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If you put all of your blood vesils in a line,they would stretch around the entire equator 2 1/2 times

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