Human Body Facts

The average adult body contains only a few grams of iron, mostly packed into the blood.

Babies are born with about 300 bones, but adults end up with only 206.

Pound for pound, human bone is stronger than steel.

Each side of the brain primarily controls the opposite side of the body.

Fingernails grow about three to four times faster than toenails.

The adult human body is made up of an estimated 37 trillion cells.

People are measurably taller in the morning than at night.

Your skin replaces itself roughly once a month.

Stomach acid is strong enough to dissolve metal, yet it doesn't dissolve your stomach.

Tooth enamel is the hardest substance the human body produces.