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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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Your body is creating and killing about 2.4 million red blood cells per second.
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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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In one day, adult lungs move about 10,000 litres of air.
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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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When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
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