The brain uses more than 25% of the oxygen

used by the human body.

The nose continues to grow throughout your life.

Everyone's tongue print is different.

15 million blood cells are produced and destroyed in the human

body every second.

There are more living organisms on the skin of a single human being that

there are human beings on the surface of the earth.

The largest cell in the human body is the female reproductive cell, the

ovum. The smallest is the male sperm.

The human body contains enough iron to make a spike strong enough to

hold your weight.

The surface area of a human lung is equal to a tennis court.

The human body transmits nerve impulses at about 90 metres a second

Spread out, the walls of the human intestines would cover an area of

about one hundred square feet.

The hydrochloric acid in the human stomach is strong enough to dissolve a

nail.

The amount of carbon in the human body is enough to fill about 9 000

'lead' pencils.

If your mouth was completely dry, you would not be able to distinguish

the taste of anything.

When you blush, your stomach lining also reddens.

If 80% of the human liver was removed, it could still function and would

eventually restore itself to its original size.

Every time you step forward, you use fifty four muscles.

If you could remove all the space from the atoms that make up your body,

you could walk through the eye of a needle.

Eighty per cent of all body heat escapes through the head.

The human body has enough fat to produce 7 bars of soap.

The human head is a quarter of our total length at birth, but only an

eighth of our total length by the time we reach adulthood.

From fertilisation to birth, a baby's weigh increase 5 000 million times.

The human body has fewer muscles in it than a caterpillar.

Human adults breathe about 23 000 time a day.

It requires 30 muscles to raise your eyebrows.

There are approximately 100 billion (100,000,000,000) neurons in your

brain. A single neuron is about 10 microns wide (average size). If all the

neurons in your brain were put side by side, they would form a line

approximately 1,000 km long. That's over 620 miles!

The human brain operates on the same amount of electricity as a 10-watt

light bulb.

A nerve can send up to 1,000 impulses per second.

Nerve impulses can travel at speeds up to 120 meters per second. That

is 268 miles per hour!

The human eye is extremely sensitive. On a clear night, a person on a

mountain can see a match being lighted as far as 80 kilometers away.

The skin is the largest organ of the body. It has a surface area of about

25 square feet.

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

on it.

Each square inch of skin contains 20 feet of blood vessels.

There are 45 miles of nerves in the skin of a human.

Your digestive tract is approximately 9 meters (30 feet) in length, open

at both ends. The large intestine is about 1.5 meters (5 feet) long and

6.5 centimeters (2.5 inches) in diameter. The small intestine is

approximately 3 meters (12 feet) long and 2.5 centimeters (1 inch) in

diameter in a living person.

The stomach can stretch to 50 times its empty size and hold about 4.5

quarts.

Every minute, about one half million damaged cells that line the stomach

are replaced.

Water molecules in the gut move at 1,500 miles per hour.

Every human spent about one half an hour as a single cell.

The lips are the most sensitive part of the body.

Every person has a unique tongue print.

The sound of a snore (up to 69 decibels) can be almost as loud as the

noise of a pneumatic drill.

Babies are born without knee caps. They don't appear until the child

reaches 2 to 6 years of age.

An eyelash lives about 5 months.

It's impossible to sneeze with your eyes open.

If all the blood vessels in a single human body were stretched end to end,

they would form a rope capable of going around the world or 60,000 miles

of blood vessels.

Beards are the fastest growing hairs on the human body. If the average

man never trimmed his beard, it would grow to nearly 30 feet long in his

lifetime.

It takes 17 muscles to smile --- 43 to frown.

The human heart creates enough pressure when it pumps out to the body

to squirt blood 30 feet.

The strongest muscle in the body is the tongue.

If people sleep 8 hours a day, that is the equivalent of 20 seconds each

minute or 122 days per year.

People can distinguish between 3,000 and 10,000 different smells.

Women blink nearly twice as much as men.

The hair of an adult man or woman can stretch 25 percent of its length

without breaking.

A person will die from a total lack of sleep sooner than from starvation.

Death will occur about 10 days without sleep, while starvation takes a few

weeks.