Human body facts

In your lifetime, you'll shed over 40 pounds (18.144 kg) of skin.

You can't tickle yourself.

People that smoke have 10 times as many wrinkles as a person that does not smoke.

It is impossible to sneeze with your eyes open.

Muscles in the human body (640 in total) make up about half of the body weight.

Compared to its size, your tongue is the strongest muscle in your body.

About 15% of women report difficulties with orgasm, and as many as 10% of woman in the United States have never climaxed.

Scientists can't agree on the exact number, but more muscles are required to frown than to smile.

The human head is a quarter of our total length at birth, but only a seventh of our total lenth by the time we reach adulthood.

The appendix is basically useless. While it does produce some white blood cells, most people are fine after an appendectomy.

A woman has approximately 4.5 liters of blood in her body, while men have 5.6 liters.

The oldest known disease in the world is leprosy.

Blondes have more hair than dark-haired people do.

Your middle fingernail grows the fastest.

The first owner of the Marlboro Company, Wayne McLaren, died of lung cancer.

Unless food is mixed with saliva you cannot taste it.

Your body uses 300 muscles to balance itself when you are standing still.

Children grow faster in the springtime then any other season during the year.

People with darker skin will not wrinkle as fast as people with lighter skin.

The muscle that lets your eye blink is the fastest muscle in your body. It allows you to blink 5 times a second.

Babies eyes do not produce tears untill the baby is approximately six to eight weeks old.

From all the oxygen that a human breathes, twenty percent goes to the brain.

All of your "thinking" is done by electricity and chemicals.

Your brain is about 75-80% water.

Only one out of every three people wash their hands when leaving a public bathroom.

On average, people spent 33% of their life sleeping.

The brain consists of 60% white matter and 40% grey matter.

About twenty-five percent of the population sneeze when they are exposed to light.

People generally read 25% slower from a computer screen compared to paper.

The average person falls asleep in about 12 to 14 minutes.

There are approximately 60 muscles in the face.

About 10% of the world's population is left-handed.

The cornea is the only living tissue in the human body that does not contain any blood vessels.

All babies are colour blind when they are born.

The reason why your nose gets runny when you are crying is because the tears from the eyes drain into the nose.

There are approximately 100 million acts of sexual intercourse each day.