Techie#1
Contributor
Amazing Facts - Body
[- Adrenal Glands -]
In the seventh month of fetal life the Adrenal Glands, located just above the kidneys, are about the same size as the kidneys. At birth they are slightly smaller, and they continue to shrink throughout life. By the time a person reaches old age, the Adrenals are so small they can hardly be seen.
[- Blood -]
In one year the average human heart circulates from 770,000 to 1.6 million gallons of blood through the body, enough fluid to fill 200 tank cars, each with a capacity of 8,000 gallons. That's 4000 gallons of blood each day. The heart creates enough pressure to squirt blood 30 feet (9 m). Blood travels 60,000 miles (96,540 km) per day on its journey through the body.
[- Blood -]
The average adult has around 10 pints (1.25 gal) of blood in their body. The Ketchua Indians of the Andes Mountains in South America have 2 to 3 more quarts of blood in their bodies than people who live at lower elevations.
[- Blood Vessels -]
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.
[- Brain -]
The average human brain has about 100 billion nerve cells. The brain of Neanderthal man was larger than that of modern man.
[- Breath -]
An adult sitting in a relaxed position inhales approximately one pint of air with every breath.
[- Capillaries -]
Human lips have a reddish color because of the great concentration of tiny capillaries just below the skin. The blood in these capillaries is normally highly oxygenated and therefore quite red. This explains why the lips appear pale when a person is anemic or has lost a great deal of blood. It also explains why the lips turn blue in very cold weather. Cold causes the capillaries to constrict, and the blood loses oxygen and changes to a darker color.
[- Eye -]
The lens of the eye continues to grow throughout a person's life.
[- Eyes -]
It's impossible to sneeze with your eyes open. When you sneeze, all your bodily functions stop even your heart.
[- Eyes -]
The average human male blinks their eyes 6,205,000 times each year but women blink nearly twice as much.
[- Hair -]
The hair of an adult man or woman can stretch 25 percent of its length without breaking. If it is less elastic, it is not healthy.
[- Hair -]
Apart from its vulnerability to fire, human hair is almost impossible to destroy. It decays at such a slow rate that it is practically nondisintegrative. It cannot be destroyed by cold, change of climate, water, or other natural forces, and it is resistant to many kinds of acids and corrosive chemicals. This is why it clogs sinks and drainpipes.
[- Hair -]
An average human scalp has 100,000 hairs.
[- Head -]
The average human head weighs around 8 pounds and the skull is made up of 29 different bones.
[- Heart -]
Your heart beats around 30 million times a year and will beat 3,000 million times in a lifetime.
[- Intestines -]
If one were to unravel the entire human alimentary canalesophagus, stomach, large and small intestines-it would reach the height of a three-story building.
[- Noise -]
Experiments conducted in West Germany and at the University of Southampton in England show that even mild and incidental noises cause the pupils of the eyes to dilate. It is believed that this is why surgeons, watchmakers, and others who perform delicate manual operations are so bothered by uninvited noise; the sound causes their pupils to change focus and blur their vision.
[- Philtrum -]
The indentation in the middle of the area between the nose and the upper lip has a name. It is called the philtrum. Scientists are somewhat baffled as to what purpose this concavity serves, and their theories by no means agree. Among the ancient Greeks this innocent little dent was considered one of body's most erogenous zones.
[- Skin -]
One square inch of skin on the human hand contains some 72 feet of nerve fiber. There is a total of 45 miles (72 km) of nerves in the skin.
[- Stomach -]
There are 35 million digestive glands in the stomach.
[- Sex -]
An average of 400 million sperms are contained in a single human ejaculation.
[- Sex -]
The amount of energy expended during sexual intercourse is roughly equivalent to the amount required to climb two flights of stairs.
[- Sex -]
Men reach the peak of their sexual powers in their late teens or early twenties, and then begin a slow decline. Usually they are past their sexual prime by their late forties. Women, on the other hand, do not reach their sexual peak until their late twenties or early thirties, and they remain at this level through their late fifties or early sixties.
[- Smell -]
The human sense of smell is so keen that it can detect the odors of certain substances even when they are diluted to 1 part to 30 billion.
[- Sunburn -]
A simple, moderately severe sunburn damages the blood vessels to such an extent that it takes four to fifteen months for them to return to their normal condition.
[- Survival -]
Even it the stomach, the spleen, 75 percent of the liver, 80 percent of the intestines, one kidney, one lung, and virtually every organ from the pelvic and groin area are removed, the human body can still survive.
[- Taste -]
A person cannot taste food unless it is mixed with saliva. For example, if a strong-tasting substance like salt is placed on a dry tongue, the taste buds will register nothing. As soon as a drop of saliva is added and the salt is dissolved, however, a definite taste sensation results. This is true for all foods. Try it.
[- Teeth -]
20 million Americans lose all their teeth yearly.
[- Water -]
The human body is comprised of 80% water.
[- Water -]
A loss of 20 percent of the body's water would result in certain and painful death. Ordinarily the body cannot go more than a week and a half without water. The longest recorded time anyone has gone without water is eleven days.
[- Weightlessness -]
When astronauts remain weightless in space for prolonged periods, scientists have discovered, their bones lose a measurable amount of weight and thickness. This means that weightlessness actually causes human beings to shrink.
[- Adrenal Glands -]
In the seventh month of fetal life the Adrenal Glands, located just above the kidneys, are about the same size as the kidneys. At birth they are slightly smaller, and they continue to shrink throughout life. By the time a person reaches old age, the Adrenals are so small they can hardly be seen.
[- Blood -]
In one year the average human heart circulates from 770,000 to 1.6 million gallons of blood through the body, enough fluid to fill 200 tank cars, each with a capacity of 8,000 gallons. That's 4000 gallons of blood each day. The heart creates enough pressure to squirt blood 30 feet (9 m). Blood travels 60,000 miles (96,540 km) per day on its journey through the body.
[- Blood -]
The average adult has around 10 pints (1.25 gal) of blood in their body. The Ketchua Indians of the Andes Mountains in South America have 2 to 3 more quarts of blood in their bodies than people who live at lower elevations.
[- Blood Vessels -]
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.
[- Brain -]
The average human brain has about 100 billion nerve cells. The brain of Neanderthal man was larger than that of modern man.
[- Breath -]
An adult sitting in a relaxed position inhales approximately one pint of air with every breath.
[- Capillaries -]
Human lips have a reddish color because of the great concentration of tiny capillaries just below the skin. The blood in these capillaries is normally highly oxygenated and therefore quite red. This explains why the lips appear pale when a person is anemic or has lost a great deal of blood. It also explains why the lips turn blue in very cold weather. Cold causes the capillaries to constrict, and the blood loses oxygen and changes to a darker color.
[- Eye -]
The lens of the eye continues to grow throughout a person's life.
[- Eyes -]
It's impossible to sneeze with your eyes open. When you sneeze, all your bodily functions stop even your heart.
[- Eyes -]
The average human male blinks their eyes 6,205,000 times each year but women blink nearly twice as much.
[- Hair -]
The hair of an adult man or woman can stretch 25 percent of its length without breaking. If it is less elastic, it is not healthy.
[- Hair -]
Apart from its vulnerability to fire, human hair is almost impossible to destroy. It decays at such a slow rate that it is practically nondisintegrative. It cannot be destroyed by cold, change of climate, water, or other natural forces, and it is resistant to many kinds of acids and corrosive chemicals. This is why it clogs sinks and drainpipes.
[- Hair -]
An average human scalp has 100,000 hairs.
[- Head -]
The average human head weighs around 8 pounds and the skull is made up of 29 different bones.
[- Heart -]
Your heart beats around 30 million times a year and will beat 3,000 million times in a lifetime.
[- Intestines -]
If one were to unravel the entire human alimentary canalesophagus, stomach, large and small intestines-it would reach the height of a three-story building.
[- Noise -]
Experiments conducted in West Germany and at the University of Southampton in England show that even mild and incidental noises cause the pupils of the eyes to dilate. It is believed that this is why surgeons, watchmakers, and others who perform delicate manual operations are so bothered by uninvited noise; the sound causes their pupils to change focus and blur their vision.
[- Philtrum -]
The indentation in the middle of the area between the nose and the upper lip has a name. It is called the philtrum. Scientists are somewhat baffled as to what purpose this concavity serves, and their theories by no means agree. Among the ancient Greeks this innocent little dent was considered one of body's most erogenous zones.
[- Skin -]
One square inch of skin on the human hand contains some 72 feet of nerve fiber. There is a total of 45 miles (72 km) of nerves in the skin.
[- Stomach -]
There are 35 million digestive glands in the stomach.
[- Sex -]
An average of 400 million sperms are contained in a single human ejaculation.
[- Sex -]
The amount of energy expended during sexual intercourse is roughly equivalent to the amount required to climb two flights of stairs.
[- Sex -]
Men reach the peak of their sexual powers in their late teens or early twenties, and then begin a slow decline. Usually they are past their sexual prime by their late forties. Women, on the other hand, do not reach their sexual peak until their late twenties or early thirties, and they remain at this level through their late fifties or early sixties.
[- Smell -]
The human sense of smell is so keen that it can detect the odors of certain substances even when they are diluted to 1 part to 30 billion.
[- Sunburn -]
A simple, moderately severe sunburn damages the blood vessels to such an extent that it takes four to fifteen months for them to return to their normal condition.
[- Survival -]
Even it the stomach, the spleen, 75 percent of the liver, 80 percent of the intestines, one kidney, one lung, and virtually every organ from the pelvic and groin area are removed, the human body can still survive.
[- Taste -]
A person cannot taste food unless it is mixed with saliva. For example, if a strong-tasting substance like salt is placed on a dry tongue, the taste buds will register nothing. As soon as a drop of saliva is added and the salt is dissolved, however, a definite taste sensation results. This is true for all foods. Try it.
[- Teeth -]
20 million Americans lose all their teeth yearly.
[- Water -]
The human body is comprised of 80% water.
[- Water -]
A loss of 20 percent of the body's water would result in certain and painful death. Ordinarily the body cannot go more than a week and a half without water. The longest recorded time anyone has gone without water is eleven days.
[- Weightlessness -]
When astronauts remain weightless in space for prolonged periods, scientists have discovered, their bones lose a measurable amount of weight and thickness. This means that weightlessness actually causes human beings to shrink.
