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The mouth has 32 teeth.

A fingernail or toenail takes about 6 months to grow from base to tip.

A human being loses an average of 40 to 100 strands of hair a day.

An individual blood cell takes about 60 seconds to make a complete circuit of the body.

Babies are born with 300 bones, but by adulthood we have only 206 in our bodies.

Every person has a unique tongue print.

Every square inch of the human body has an average of 32 million bacteria on it.

Fingerprints serve a function - they provide traction for the fingers to grasp things.

Humans shed about 600,000 particles of skin every hour - about 1.5 pounds a year.
By 70 years of age, an average person will have lost 105 pounds of skin.

The air that leaves a person's lungs during exhalation contains 14% oxygen and 4.4% carbon dioxide. Atmospheres with oxygen concentrations below 19.5 percent can have adverse physiological effects, and atmospheres with less than 16 percent oxygen can become life threatening.