Amazing Facts about Human

**استاذ انور** · 27-05-2010, 12:50 AM

The human eye blinks an average of 4,200,000 times a year.
The smallest bone in the human body is the stapes or stirrup bone located in the middle ear. It is approximately .11 inches (.28 cm) long.
There are 206 bones in the adult human body and there are 300 in children (as they grow some of the bones fuse together).
It takes approximately 12 hours for food to entirely digest.
Human jaw muscles can generate a force of 200 pounds (90.8 kilograms) on the molars.
The Skylab astronauts grew 1.5 – 2.25 inches (3.8 – 5.7 centimeters) due to spinal lengthening and straightening as a result of zero gravity.
The heaviest human brain ever recorded weighed 5 lb. 1.1 oz. (2.3 kg.)
By raising your legs slowly and laying on your back, you can’t sink in quicksand.
Children grow faster in the springtime.
The thyroid cartilage is more commonly known as the adams apple.
The average human brain has about 100 billion nerve cells.
The only jointless bone in your body is the hyoid bone in your throat
It takes the interaction of 72 different muscles to produce human speech.
It’s impossible to sneeze with your eyes open.
Babies are born without knee caps. They don’t appear until the child reaches 2-6 years of age.
There are 10 human body parts that are only 3 letters long (eye hip arm leg ear toe jaw rib lip gum).
An average human scalp has 100,000 hairs.
The entire length of all the eyelashes shed by a human in their life is over 98 feet (30 m).
Hair is made from the same substance as fingernails.
The pancreas produces Insulin.
Every year about 98% of the atoms in your body are replaced.
The average human heart will beat 3,000 million times in its lifetime and pump 48 million gallons of blood.
After spending hours working at a computer display, look at a blank piece of white paper. It will probably appear pink.
Babies are born with 300 bones, but by adulthood we have only 206 in our bodies.
Each square inch of human skin consists of twenty feet of blood vessels.
Fingernails grow faster than toenails.
A fetus acquires fingerprints at the age of three months.
A human being loses an average of 40 to 100 strands of hair a day.
During a 24-hour period, the average human will breathe 23,040 times.
Each square inch (2.5 cm) of human skin consists of 20 feet (6 m) of blood vessels.
Human blood travels 60,000 miles (96,540 km) per day on its journey through the body.
After you die, your body starts to dry out creating the illusion that your hair and nails are still growing after death.
If you go blind in one eye you only lose about one fifth of your vision but all your sense of depth