random facts about the human body?

answers1: In one day, a human sheds 10 billion skin flakes. This
amounts to approximately two kilograms in a year. <br>
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The human body makes anywhere from 1 to 3 pints of saliva every 24 hours <br>
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During pregnancy, the average woman's uterus expands up to five
hundred times its normal size. <br>
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The slowest growing finger nail is on the thumb nail and the fastest
growing is the finger nail on the middle finger. <br>
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The length of a human esophagus is 25 centimeters. <br>
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The feet have approximately 250,000 sweat glands. <br>
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The human face is made up of 14 bones. <br>
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Humans are born with 300 bones in their body, however when a person
reaches adulthood they only have 206 bones. This occurs because many
of them join together to make a single bone. <br>
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Your thigh bone is stronger than concrete <br>
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Men sweat more than women. This is because women can better regulate
the amount of water they lose <br>
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In one day, adult lungs move about 10,000 liters of air. <br>
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Close to fifty percent of the bacteria in the mouth lives on the
surface of our tongue. <br>
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85% of the population can curl their tongue into a tube. <br>
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On average, a hair strand's life span is five and a half years. <br>
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The reason why hair turns gray as we age is because the pigment cells
in the hair follicle start to die, which is responsible for producing
"melanin" which gives the hair colour. <br>
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Everyday approximately 35 meters of hair fiber is produced on the
scalp of an adult <br>
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The eye of a human can distinguish 500 shades of the gray. <br>
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The cornea is the only living tissue in the human body that does not
contain any blood vessels. <br>
<br>
Once a human reaches the age of 35, he/she will start losing
approximately 7,000 brain cells a day. The cells will never be
replaced. <br>
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It is not possible to tickle yourself. The cerebellum, a part of the
brain, warns the rest of the brain that you are about to tickle
yourself. Since your brain knows this, it ignores the resulting
sensation. <br>
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Your brain is move active and thinks more at night than during the day. <br>
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answers2: Some cancers can be detected early by a simple blood test.
answers3: it takes more muscles to frown than it does to smile =)
answers4: In one day, a human sheds 10 billion skin flakes. This
amounts to approximately two kilograms in a year. <br>
<br>
Every square inch of the human body has about 19,000,000 skin cells. <br>
<br>
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Every hour one billion cells in the body must be replaced. <br>
<br>
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The small intestine in the human body is about 2 inches around, and 22
feet long. <br>
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The human body makes anywhere from 1 to 3 pints of saliva every 24 hours. <br>
<br>
The human body has approximately 37,000 miles of capillaries. <br>
<br>
The aorta, which is largest artery located in the body, is about the
diameter of a garden hose. <br>
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The adult human body requires about 88 pounds of oxygen daily. <br>
<br>
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An average women has 17 square feet of skin. When a women is in her
ninth month of pregnancy she has 18.5 square feet of skin. <br>
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The width of your arm span stretched out is the length of your whole body. <br>
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These all came from the following web site & there are many more....