- Women blink twice as much as men.
- If one is blind in one eye, he only loses about 1/5 of vision and the sense of depth.
- Our eyes are always the same size from birth, but our nose and ears never stop growing.
- The length of the finger shows how fast the fingernail grows. The nail on the middle finger grows fastest. On the average our toenails grow twice as slow as our fingernails.
- Hair is made of the same substance as fingernails.
- The nose can remember 50,000 scents.
- A finger nails takes about 6 months to grow from base to tip.
- The energy used by the brain is enough to light a 25 watt bulb.
- The heart produces enough pressure to squirt blood 900 cm.
- We get a new stomach lining every 3-4 days. If we didn't, the strong acids our stomach uses to digest food would also digest our stomach.
- A pair of feet has 500,00 sweat glands.
- Each square inch of human skin consist of 600 cm of blood vessels.
- The liver is the only major organ in the human body that can regenerate itself if part of it is removed.
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