An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
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The largest cell in the human body is the female egg and the smallest is the male sperm.
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If you are cold you are more likely to be hungry because you use energy to keep warm.
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It takes about 20 seconds for a red blood cell to circle the whole body.
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If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
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Your body is creating and killing about 2.4 million red blood cells per second.
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An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
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Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
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