The eye does not "see" but transforms light to nerve impulses which is interpreted by the brain.
If all 600 muscles in your body pulled in one direction, you could lift 25 tons.
More than half of your body's 206 bones are located in your hands and feet.
Your digestive tract is thirty feet long.
Your body produces one billion red blood cells every day.
Your heart pumps more than 5 quarts of blood every minute, about 2,000 gallons a day.
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