*The brain uses over a quarter of the oxygen used by the human body!
*Your heart beats around 100000 times a day, 36500000 times a year and over a billion times if you live beyond 30!
*Blood makes up around 7% of the weight of a human body!
*A large amount of the dust in your home is actually dead skin!
Adult lungs have a surface area of around 70 square meters!
*Rapid eye movement sleep makes up around 25% of total sleep time and is often when you have your most vivid dreams!
*Humans form 2 sets of teeth over the course of their lives!
*The smallest bone found in the human body is located in the middle ear. The staples (or stirrup) bone is only 2.8 millimeters long!
*Your nose and ears continue growing throughout your entire life!
*Infants blink only once or twice a minute while adults average around 10!
As well as having unique fingerprints, humans also have unique tongue prints!
It takes the body around 12 hours to completely digest eaten food!
*Your sense of smell is around 10000 times more sensitive than your sense of taste!
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