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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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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If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
Enamel is hardest substance in the human body.
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There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
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Your body is creating and killing about 2.4 million red blood cells per second.
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