There's 100 trillion good bacteria living in your 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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One human hair can support 3 ounces.
191
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
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In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
Your body is creating and killing about 2.4 million red blood cells per second.
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