50 Human Body Secrets
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Sagar Mody
May 23, 2013, 8:58:53 AM5/23/13
to SagarsDailySpice
This'll make ya think...
The Human Body is a treasure trove of mysteries, one
that still confounds doctors and scientists about the details of its
working. It's not an overstatement to say that every part of your body
is a miracle. Here are fifty facts about your body, some of which will
leave you stunned... or...
1. It's possible for your body to survive without a
surprisingly large fraction of its internal organs. Even if you lose
your stomach, your spleen, 75% of your liver, 80% of your intestines,
one kidney, one lung, and virtually every organ from your pelvic and
groin area, you wouldn't be very healthy, but you would live.
2. During your lifetime, you will produce enough
saliva to fill two swimming pools. Actually, Saliva is more important
than you realize. If your saliva cannot dissolve something, you cannot
taste it.
3. The largest cell in the human body is the female
egg and the smallest is the male sperm. The egg is actually the only
cell in the body that is visible by the naked eye.
4. The strongest muscle in the human body is the
tongue and the hardest bone is the jawbone.
5. Human feet have 52 bones, accounting for one
quarter of all the human body's bones.
6. Feet have 500,000 sweat glands and can produce more
than a pint of sweat a day.
7. The acid in your stomach is strong enough to
dissolve razor blades. The reason it doesn't eat away at your stomach
is that the cells of your stomach wall renew themselves so frequently
that you get a new stomach lining every three to four days.
8. The human lungs contain approximately 2,400
kilometers (1,500 mi) of airways and 300 to 500 million hollow
cavities, having a total surface area of about 70 square meters,
roughly the same area as one side of a tennis court. Furthermore, if
all of the capillaries that surround the lung cavities were unwound
and laid end to end, they would extend for about 992 kilometers. Also,
your left lung is smaller than your right lung to make room for your
heart.
9. Sneezes regularly exceed 100 mph , while coughs
clock in at about 60 mph.
10. Your body gives off enough heat in 30 minutes to
bring half a gallon of water to a boil.
11. Your body has enough iron in it to make a nail 3
inches long.
12. Earwax production is necessary for good ear health
It protects the delicate inner ear from bacteria, fungus, dirt and
even insects. It also cleans and lubricates the ear canal.
13. Everyone has a unique smell, except for identical
twins, who smell the same.
14. Your teeth start growing 6 months before you are
born. This is why one out of every 2,000 newborn infants has a tooth
when they are born
15. A baby's head is one-quarter of its total length,
but by the age of 25 will only be one-eighth of its total length. This
is because people's heads grow at a much slower rate than the rest of
their bodies.
16. Babies are born with 300 bones, but by adulthood
the number is reduced to 206. Some of the bones, like skull bones, get
fused into each other, bringing down the total number.
17. It's not possible to tickle yourself. This is
because when you attempt to tickle yourself you are totally aware of
the exact time and manner in which the tickling will occur, unlike
when someone else tickles you.
18. Less than one third of the human race has 20-20
vision. This means that two out of three people cannot see perfectly.
19. Your nose can remember 50,000 different scents.
But if you are a woman, you are a better smeller than men, and will
remain a better smeller throughout your life.
20. The human body is estimated to have 60,000 miles
of blood vessels.
21. The three things pregnant women dream most of
during their first trimester are frogs, worms and potted plants.
Scientists have no idea why this is so, but attribute it to the
growing imbalance of hormones in the body during pregnancy.
22. The life span of a human hair is 3 to 7 years on
average. Every day the average person loses 60-100 strands of hair.
But don't worry, you must lose over 50% of your scalp hairs before it
is apparent to anyone.
23. The human brain cell can hold 5 times as much
information as an encyclopedia. Your brain uses 20% of the oxygen that
enters your bloodstream, and is itself made up of 80% water. Though it
interprets pain signals from the rest of the body, the brain itself
cannot feel pain.
24. The tooth is the only part of the human body that
can't repair itself.
25. Your eyes are always the same size from birth but
your nose and ears never stop growing.
26. By 60 years of age, 60% of men and 40% of women will snore.
27. We are about 1 cm taller in the morning than in
the evening, because during normal activities during the day, the
cartilage in our knees and other areas slowly compress.
28. The brain operates on the same amount of power as
10-watt light bulb, even while you are sleeping. In fact, the brain is
much more active at night than during the day.
29. Nerve impulses to and from the brain travel as
fast as 170 miles per hour. Neurons continue to grow throughout human
life. Information travels at different speeds within different types
of neurons.
30. It is a fact that people who dream more often and
more vividly, on an average have a higher Intelligence Quotient.
31. The fastest growing nail is on the middle finger.
32. Facial hair grows faster than any other hair on
the body. This is true for men as well as women.
33. There are as many hairs per square inch on your
body as a chimpanzee.
34. A human fetus acquires fingerprints at the age of
three months.
35. By the age of 60, most people will have lost about
half their taste buds.
36. About 32 million bacteria call every inch of your
skin home. But don't worry, a majority of these are harmless or even
helpful bacteria.
37. The colder the room you sleep in, the higher the
chances are that you'll have a bad dream.
38. Human lips have a reddish color because of the
great concentration of tiny capillaries just below the skin.
39. Three hundred million cells die in the human body
every minute.
40. Like fingerprints, every individual has an unique
tongue print that can be used for identification.
41. A human head remains conscious for about 15 to 20
seconds after it has been decapitated.
42. It takes 17 muscles to smile and 43 to frown.
43. Humans can make do longer without food than sleep
. Provided there is water, the average human could survive a month to
two months without food depending on their body fat and other factors.
Sleep deprived people, however, start experiencing radical personality
and psychological changes after only a few sleepless days. The longest
recorded time anyone has ever gone without sleep is 11 days, at the
end of which the experimenter was awake, but stumbled over words,
hallucinated and frequently forgot what he was doing.
44. The most common blood type in the world is Type O.
The rarest blood type, A-H or Bombay blood, due to the location of its
discovery, has been found in less than hundred people since it was
discovered
45. Every human spent about half an hour after being
conceived, as a single cell. Shortly afterward, the cells begin
rapidly dividing and begin forming the components of a tiny embryo.
46. Right-handed people live, on average, nine years
longer than left-handed people do. This is largely due to the fact
that a majority of the machines and tools we use on a daily basis are
designed for those who are right handed, making them somewhat
dangerous for lefties to use and resulting in thousands of accidents
and deaths each year.
47. Your ears secrete more earwax when you are afraid
than when you aren't.
48. Koalas and primates are the only animals with
unique fingerprints.
49. Humans are the only animals to produce emotional tears.
50. The human heart creates enough pressure to squirt
blood 30 feet in the air.
The Human Body is a treasure trove of mysteries, one
that still confounds doctors and scientists about the details of its
working. It's not an overstatement to say that every part of your body
is a miracle. Here are fifty facts about your body, some of which will
leave you stunned... or...
1. It's possible for your body to survive without a
surprisingly large fraction of its internal organs. Even if you lose
your stomach, your spleen, 75% of your liver, 80% of your intestines,
one kidney, one lung, and virtually every organ from your pelvic and
groin area, you wouldn't be very healthy, but you would live.
2. During your lifetime, you will produce enough
saliva to fill two swimming pools. Actually, Saliva is more important
than you realize. If your saliva cannot dissolve something, you cannot
taste it.
3. The largest cell in the human body is the female
egg and the smallest is the male sperm. The egg is actually the only
cell in the body that is visible by the naked eye.
4. The strongest muscle in the human body is the
tongue and the hardest bone is the jawbone.
5. Human feet have 52 bones, accounting for one
quarter of all the human body's bones.
6. Feet have 500,000 sweat glands and can produce more
than a pint of sweat a day.
7. The acid in your stomach is strong enough to
dissolve razor blades. The reason it doesn't eat away at your stomach
is that the cells of your stomach wall renew themselves so frequently
that you get a new stomach lining every three to four days.
8. The human lungs contain approximately 2,400
kilometers (1,500 mi) of airways and 300 to 500 million hollow
cavities, having a total surface area of about 70 square meters,
roughly the same area as one side of a tennis court. Furthermore, if
all of the capillaries that surround the lung cavities were unwound
and laid end to end, they would extend for about 992 kilometers. Also,
your left lung is smaller than your right lung to make room for your
heart.
9. Sneezes regularly exceed 100 mph , while coughs
clock in at about 60 mph.
10. Your body gives off enough heat in 30 minutes to
bring half a gallon of water to a boil.
11. Your body has enough iron in it to make a nail 3
inches long.
12. Earwax production is necessary for good ear health
It protects the delicate inner ear from bacteria, fungus, dirt and
even insects. It also cleans and lubricates the ear canal.
13. Everyone has a unique smell, except for identical
twins, who smell the same.
14. Your teeth start growing 6 months before you are
born. This is why one out of every 2,000 newborn infants has a tooth
when they are born
15. A baby's head is one-quarter of its total length,
but by the age of 25 will only be one-eighth of its total length. This
is because people's heads grow at a much slower rate than the rest of
their bodies.
16. Babies are born with 300 bones, but by adulthood
the number is reduced to 206. Some of the bones, like skull bones, get
fused into each other, bringing down the total number.
17. It's not possible to tickle yourself. This is
because when you attempt to tickle yourself you are totally aware of
the exact time and manner in which the tickling will occur, unlike
when someone else tickles you.
18. Less than one third of the human race has 20-20
vision. This means that two out of three people cannot see perfectly.
19. Your nose can remember 50,000 different scents.
But if you are a woman, you are a better smeller than men, and will
remain a better smeller throughout your life.
20. The human body is estimated to have 60,000 miles
of blood vessels.
21. The three things pregnant women dream most of
during their first trimester are frogs, worms and potted plants.
Scientists have no idea why this is so, but attribute it to the
growing imbalance of hormones in the body during pregnancy.
22. The life span of a human hair is 3 to 7 years on
average. Every day the average person loses 60-100 strands of hair.
But don't worry, you must lose over 50% of your scalp hairs before it
is apparent to anyone.
23. The human brain cell can hold 5 times as much
information as an encyclopedia. Your brain uses 20% of the oxygen that
enters your bloodstream, and is itself made up of 80% water. Though it
interprets pain signals from the rest of the body, the brain itself
cannot feel pain.
24. The tooth is the only part of the human body that
can't repair itself.
25. Your eyes are always the same size from birth but
your nose and ears never stop growing.
26. By 60 years of age, 60% of men and 40% of women will snore.
27. We are about 1 cm taller in the morning than in
the evening, because during normal activities during the day, the
cartilage in our knees and other areas slowly compress.
28. The brain operates on the same amount of power as
10-watt light bulb, even while you are sleeping. In fact, the brain is
much more active at night than during the day.
29. Nerve impulses to and from the brain travel as
fast as 170 miles per hour. Neurons continue to grow throughout human
life. Information travels at different speeds within different types
of neurons.
30. It is a fact that people who dream more often and
more vividly, on an average have a higher Intelligence Quotient.
31. The fastest growing nail is on the middle finger.
32. Facial hair grows faster than any other hair on
the body. This is true for men as well as women.
33. There are as many hairs per square inch on your
body as a chimpanzee.
34. A human fetus acquires fingerprints at the age of
three months.
35. By the age of 60, most people will have lost about
half their taste buds.
36. About 32 million bacteria call every inch of your
skin home. But don't worry, a majority of these are harmless or even
helpful bacteria.
37. The colder the room you sleep in, the higher the
chances are that you'll have a bad dream.
38. Human lips have a reddish color because of the
great concentration of tiny capillaries just below the skin.
39. Three hundred million cells die in the human body
every minute.
40. Like fingerprints, every individual has an unique
tongue print that can be used for identification.
41. A human head remains conscious for about 15 to 20
seconds after it has been decapitated.
42. It takes 17 muscles to smile and 43 to frown.
43. Humans can make do longer without food than sleep
. Provided there is water, the average human could survive a month to
two months without food depending on their body fat and other factors.
Sleep deprived people, however, start experiencing radical personality
and psychological changes after only a few sleepless days. The longest
recorded time anyone has ever gone without sleep is 11 days, at the
end of which the experimenter was awake, but stumbled over words,
hallucinated and frequently forgot what he was doing.
44. The most common blood type in the world is Type O.
The rarest blood type, A-H or Bombay blood, due to the location of its
discovery, has been found in less than hundred people since it was
discovered
45. Every human spent about half an hour after being
conceived, as a single cell. Shortly afterward, the cells begin
rapidly dividing and begin forming the components of a tiny embryo.
46. Right-handed people live, on average, nine years
longer than left-handed people do. This is largely due to the fact
that a majority of the machines and tools we use on a daily basis are
designed for those who are right handed, making them somewhat
dangerous for lefties to use and resulting in thousands of accidents
and deaths each year.
47. Your ears secrete more earwax when you are afraid
than when you aren't.
48. Koalas and primates are the only animals with
unique fingerprints.
49. Humans are the only animals to produce emotional tears.
50. The human heart creates enough pressure to squirt
blood 30 feet in the air.
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