-A full bladder is roughly the size of a soft ball.
- Approximately 75% of human faeces is made of water.
- It takes the food seven seconds to get from your mouth to your stomach.
-One human hair can support 3kg.
- Human thighbones are stronger than concrete.
-The attachment of human muscles to skin is what causes dimples.
-Your thumb is the same length of your nose.
- A woman's heart beats faster than a man's.
- If the average male never shaved, his beard would be 13 feet long when he died.
- Men without hair on their chests are more likely to get cirrhosis of the liver than men with hair.
-There are about one trillion bacteria on each of your feet.
- Side by side, 2000 cells from the human body could cover about one square inch.
- Women blink twice as much as men.
-The average person's skin weighs twice as much as their brain.
- When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
- It takes twice as long to lose new muscle if you stop working out than it did to gain it.
-You're ears secrete more earwax when you are afraid than when you aren't.
-Your body uses 300 muscles to balance itself when you are standing still.
- If saliva cannot dissolve something, you cannot taste it.
-The average woman is 5 inches shorter than the average man.
In one day, a human sheds 10 billion skin flakes. This amounts to approximately two kilograms in a year.
Every square inch of the human body has about 19,000,000 skin cells.
Approximately 25% of all scald burns to children are from hot tap water and is associated with more deaths than with any other liquid.
Forty-one percent of women apply body and hand moisturizer at least three times a day.
Every hour one billion cells in the body must be replaced.
The world record for the number of body piercing on one individual is 702, which is held by Canadian Brent Moffat.
The small intestine in the human body is about 2 inches around, and 22 feet long.
The human body makes anywhere from 1 to 3 pints of saliva every 24 hours.
The human body has approximately 37,000 miles of capillaries.
The aorta, which is largest artery located in the body, is about the diameter of a garden hose.
The adult human body requires about 88 pounds of oxygen daily.
It is very common for babies in New Zealand to sleep on sheepskins. This is to help them gain weight faster, and retain their body heat.
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.
The width of your armspan stretched out is the length of your whole body.
41% of women apply body or hand moisturizer a minimum three times a day.
A human's small intestine is 6 meters long.
There are as many hairs per square inch on your body as a chimpanzee. You don't see all of them because most are too fine and light to be noticed.
Every hour one billion cells in the body must be replaced.
Dead cells in the body ultimately go to the kidneys for excretion.
By walking an extra 20 minutes every day, an average person will burn off seven pounds of body fat in an year.
The human body is 75% water.
1.In the average adult, the skin covers 12-20 square feet and accounts for 12% of body weight.b
2.There are more than 600 individual skeletal muscles in the human body.c
3.An adult skeleton has 213 bones.a
4.Cartilage is one of the few tissues that grows throughout life. Between ages 30 and 70, a nose might grow half an inch, and the ears grow about a quarter of an inch.e
5.A newborn's skull contains gaps between its bony plates. In an adult, the jagged plates interlock tightly like a jigsaw puzzle.a
6.The average human head has about 100,000 hairs.c
7.As a person ages, the diameter of each hair on the head shrinks. Hair is thickest in the early 20s, but by age 70, it can be as fine as a baby's. Aging also causes hair to grow where it is not wanted, such as in the nose and ears, and to fall out where it is desired.e
8.Hundreds of billions of neurons carry electrical signals that control the body from the brain and the spinal cord.c
Alien hand syndrome occurs when a brain injury victim loses control over a hand, as if it is possessed by an alien being
9.After sustaining trauma to the brain—such as an injury, stroke, or infection—some people develop “alien hand syndrome,” a condition where the victim can feel sensation in the hand, but has no control over movement and does not sense the hand as a part of the body, as if it belonged to an alien being.d
10.The Greek philosopher Aristotle believed that the brain exists mainly to help cool the spirit. It is now known that the brain controls nearly every function of the body and mind.c
11.When the pituitary gland malfunctions, it can boost or reduce the amount of growth hormone in a growing child's body, resulting in gigantism or dwarfism.a
12.The senses are highly attuned to our world, but they have limits. For example, humans cannot see in the ultraviolet spectrum as bees do, nor can they differentiate between the hundreds of millions of odors that a bloodhound can.c
13.The appendix has no function in modern humans. It is believed to have been part of the digestive system in our primitive ancestors.b
14.Humans smell “in stereo.” Scent signals from each nostril travel to different regions in the brain. This may help a person determine the direction the odor is coming from.c
15.The skin contains approximately 640,000 sense receptors, scattered unevenly over the body's surface. These receptors are most abundant in the ridges of the fingertips, in the lips, at the tip of the tongue, in the palms, on the soles of the feet, and in the genitals.e
16.An estimated five million olfactory receptors are clustered in the membrane at the upper part of our nasal passages. These receptors help us distinguish among thousands of different odors.e
17.There are about 9,000 taste buds on the surface of the tongue, in the throat, and on the roof of the mouth.b Taste buds contain chemoreceptors that respond to chemicals from food and other substances that are dissolved by the saliva in the mouth.e
18.Humans produce about 10,000 gallons of saliva in a lifetime. Saliva is required for taste—until food is dissolved by saliva, we cannot taste it.b
19.Hearing is one of the less acute senses in humans, compared to the many other animals which can detect sound at much higher and lower frequency than humans can.c
The lens of the eye thickens as a person ages, causing many middle-aged people to need glasses
20.As humans grow older, the lens in the eye grows thicker. This is why people who once had perfect vision often need glasses in their 40s.c
21.An adult human body contains approximately 100 trillion cells.e
22.The body carries about 25 trillion red blood cells (erythrocytes), the most abundant cells in the body. Red blood cells make up about 45% of blood's volume.e
23.Every hour, about 180 million newly formed red blood cells enter the bloodstream. Red blood cells are basically shells. Before being released from the bone marrow, most of a red blood cell's internal structure is ejected, creating a disc-shaped balloon that is ideal for carrying oxygen and a small amount of the body's carbon dioxide.c
24.White blood cells, or leukocytes, make up about 1% of blood. This number can double within a day when a body responds to infection.c
25.The circulatory system of arteries, veins, and capillaries is about 60,000 miles long.e
26.The heart beats more than 2.5 billion times in an average lifetime.b
27.Unlike other muscles, the heart muscle contracts without stimulus from the nervous system. Signals for the heart to beat come from the sinoatrial node near the top of the right atrium.c
28.In a healthy adult, the small intestine can range between 18 and 23 feet long, about four times longer than the person is tall.b About 90% of the body's nutrients are absorbed into the bloodstream in the small intestine.c
29.At about five feet in length, the large intestine is shorter than the small intestine. However, it is more spacious so it can store and process material that will be eliminated.c
30.There are approximately 400 feet of seminiferous tubules in the testes of a human male.c This is where sperm is stored until an ejaculation releases 200 million to 500 million sperm, each of which is capable of fertilizing an egg.e
31.During ovulation, the number of white blood cells in the cervical mucus drops dramatically. If it did not, the white blood cells would destroy all foreign bodies, including sperm.e
32.Unlike other cells, which contain an individual's full DNA, the egg and sperm each contain only half of the DNA required to create a new human. Both halves must be combined for humans to reproduce.g
A good diet helps a child's brain develop properly
33.Proper diet is critical for brain development in children. The brains of children who have died of malnutrition during the first year of life have fewer brain cells and an overall smaller size than the brains of healthy children.f
34.DNA, the basic building block of life, is a long molecule containing four chemical bases: adenine (A), guanine (G), thymine (T), and cytosine (C).g
35.The human genome—half the DNA contents of a single nucleus—contains about 31 billion base pairs: 31,000,000,000 A's, G's, T's, and C's.g
36.Six billion steps of DNA are contained in a single cell. This DNA can be stretched six feet, but it is coiled up in the cell's nucleus, which measures only 1/2500 of an inch in diameter.e
37.The maximum length of a mammal's life is generally related to its size. Thus, a man's lifespan should be somewhere between that of a goat and a horse, between 10 and 30 years. However, humans have developed ways to protect themselves from predators and disease, increasing their average lifespan to 74.7 years in the United States.
- A full bladder is roughly the size of a soft ball.
- It takes the food seven seconds to get from your mouth to your stomach.
- One human hair can support 3 kg.
- Human thighbones are stronger than concrete.
- The attachment of human muscles to skin is what causes dimples.
-Your thumb is the same length of your nose.
- A woman's heart beats faster than a man's.
- If the average male never shaved, his beard would be 13 feet long when he died.
- Men without hair on their chests are more likely to get cirrhosis of the liver than men with hair.
- There are about one trillion bacteria on each of your feet.
- Side by side, 2000 cells from the human body could cover about one square inch.
- Women blink twice as much as men.
- The average person's skin weighs twice as much as their brain.
- When you are looking at someone you love, your pupils dilate,
They do the same when you are looking at someone you hate.
- It takes twice as long to lose new muscle if you stop working out than it did to gain it.
- You're ears secrete more earwax when you are afraid than when you aren't.
- Your body uses 300 muscles to balance itself when you are standing still.
- If saliva cannot dissolve something, you cannot taste it.
- The average woman is 5 inches shorter than the average man.
•A human being loses an average of 40 to 100 strands of hair a day.
•A cough releases an explosive charge of air that moves at speeds up to 60 mph.
•Every time you lick a stamp, you're consuming 1/10 of a calorie.
•A fetus acquires fingerprints at the age of three months.
•A sneeze can exceed the speed of 100 mph.
•Every person has a unique tongue print.
•According to German researchers, the risk of heart attack is higher on Monday than any other day of the week.
•After spending hours working at a computer display, look at a blank piece of white paper. It will probably appear pink.
•An average human drinks about 16,000 gallons of water in a lifetime.
•A fingernail or toenail takes about 6 months to grow from base to tip.
•An average human scalp has 100,000 hairs.
•It takes 17 muscles to smile and 43 to frown.
•Babies are born with 300 bones, but by adulthood we have only 206 in our bodies.
•Beards are the fastest growing hairs on the human body. If the average man never trimmed his beard, it would grow to nearly 30 feet long in his lifetime.
•By age sixty, most people have lost half of their taste buds. By the time you turn 70, your heart will have beat some two-and-a-half billion times (figuring on an average of 70 beats per minute.)
•Each square inch of human skin consists of twenty feet of blood vessels.
•Every human spent about half an hour as a single cell.
•Every person has a unique tongue print. Every square inch of the human body has an average of 32 million bacteria on it.
•Fingernails grow faster than toenails.
•Humans shed about 600,000 particles of skin every hour - about 1.5 pounds a year. By 70 years of age, an average person will have lost 105 pounds of skin.
Babies are born with 300 bones, but by adulthood we have only 206 in our bodies.
What happens is babies are born with incomplete bones - many consist of several chunks of bone connected by cartilage. Later on, the cartilage is replaced by real bone, resulting in two or more bone pieces 'fusing' into one adult bone.
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