21. 
There are more
living organisms on the skin of a single human being than there are human beings
on the surface of the earth.
22.
From the age of
thirty, humans gradually begin to shrink in size.
23.
Your body contains
enough iron to make a spike strong enough to hold your weight.
24.
The
surface area of a human lung is equal to that of a tennis court.
25.
Most
people have lost fifty per cent of their taste buds by the time they reach the
age of sixty.
26.
The amount of carbon
in the human body is enough to fill about 9,000 'lead' pencils.
27.
One
square inch of human skin contains 625 sweat glands.
28.
When you blush,
your stomach lining also reddens.
29.
The human body
has less muscles in it than a caterpillar.
30.
If you could save
all the times your eyes blink in one life time and use them all at once you
would see blackness for 1.2 years!
31.
The life span of
a taste bud is ten days.
32.
It's impossible to
sneeze with your eyes open.
33.
Give a tennis
ball a good, hard squee ze. You're using about the same amount of force your
heart uses to pump blood out to the body.
34.
The aorta, the
largest artery in the body, is almost the diameter of a garden hose.
35.
Capillaries, on the other hand, are so small that it takes ten of them to equal
the thickness of a human hair. 36. 
Your body has
about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates
through the body three times every minute.
37.
The heart pumps
about 1 million barrels of blood during an average lifetime--that's enough to
fill more than 3 super tankers.
38.
Babies start
dreaming even before they're born.
39.
The human body
can function without a brain.
40.
Humans are the only
primates that don't have pigment in the palms of their hands.
Sources:medindia.net
There are more
living organisms on the skin of a single human being than there are human beings
on the surface of the earth. 22.
From the age of
thirty, humans gradually begin to shrink in size. 23.
Your body contains
enough iron to make a spike strong enough to hold your weight. 24.
The
surface area of a human lung is equal to that of a tennis court. 25.
Most
people have lost fifty per cent of their taste buds by the time they reach the
age of sixty. 26.
The amount of carbon
in the human body is enough to fill about 9,000 'lead' pencils. 27.
One
square inch of human skin contains 625 sweat glands. 28.
When you blush,
your stomach lining also reddens.29.
The human body
has less muscles in it than a caterpillar. 30.
If you could save
all the times your eyes blink in one life time and use them all at once you
would see blackness for 1.2 years! 31.
The life span of
a taste bud is ten days. 32.
It's impossible to
sneeze with your eyes open. 33.
Give a tennis
ball a good, hard squee ze. You're using about the same amount of force your
heart uses to pump blood out to the body. 34.
The aorta, the
largest artery in the body, is almost the diameter of a garden hose. 35.
Capillaries, on the other hand, are so small that it takes ten of them to equal
the thickness of a human hair. 36. Your body has
about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates
through the body three times every minute. 37.
The heart pumps
about 1 million barrels of blood during an average lifetime--that's enough to
fill more than 3 super tankers. 38.
Babies start
dreaming even before they're born. 39.
The human body
can function without a brain. 40.
Humans are the only
primates that don't have pigment in the palms of their hands.
Sources:medindia.net
Engr.Sulthan
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