Your heart will pump about 212 million liters in its lifetime.
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It takes about 20 seconds for a red blood cell to circle the whole body.
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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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The human brain uses approximately as much energy as a 10 watt light bulb.
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Every year your body replaces 98% of your atoms.
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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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Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
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Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
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