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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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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You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
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The human body contains over a billion miles of DNA.
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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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The human sigh acts as a physiological reset button.
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The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
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