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Interesting Facts about the Human Body

A fabulous list of facts about the human body, for example, most people shed 40 pounds of skin in a lifetime!
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Biology (1,766)

Science (4,777)

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  • The thickness of your skin varies from 1/2 to 6 millimeters, depending on the area of your body.

  • The four taste zones on your tongue are bitter (back), sour (back sides), salty (front sides), and sweet (front).

  • The five senses are sight, hearing, smell, touch, and taste.

  • Your body contains eight pints of blood.

  • You use 14 muscles to smile and 43 to frown.

  • The strongest muscle of the body is the masseter muscle, which is located in the jaw.

  • Muscles normally account for 40 percent of one's body weight.

  • There are 230 joints in the body.

  • Kids have 20 first teeth. Adults have 32 teeth.

  • The small intestines are about 25 feet long.

  • The large intestines are five feet long and are three times wider than the small intestines.

  • Most people shed 40 pounds of skin in a lifetime.

  • Your body is 70 percent water.

  • Normal body temperature is 98.6° Fahrenheit.

  • When you sneeze, air rushes through your nose at a rate of 100 mph.

  • An eyelash lives about 150 days before it falls out.

  • Your brain sends messages at the rate of 240 mph.

  • About 400 gallons of blood flow through your kidneys in one day.

  • You blink your eyes about 20,000 times a day.

    Your heart beats about 100,000 times a day.

  • Humans breathe 20 times per minute, more than 10 million times per year and about 700 million times in a lifetime.

  • You have about 100,000 hairs on your head.

  • There are 10 million nerve cells in your brain.

  • Each of your eyes has 120 million rods, which help you see in black and white.

  • Each eye has six million cones, which help you see in color.

  • One in 12 men is color blind.

  • Placed end to end, all your body's blood vessels would measure about 62,000 miles.

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Provided by Infoplease—an authoritative, comprehensive reference website that offers an encyclopedia, a dictionary, an atlas, and several almanacs. Visit Infoplease.com to find more resources endorsed by teachers and librarians.

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