Thursday, July 21, 2011

Today's Trivia – The Human Body

Once again, the useless but interesting information is all about the amazing human body...


- Fingernails grow faster than toenails.

- Fingerprints serve a function - they provide traction for the fingers to grasp things.

- From the age of thirty, humans gradually begin to shrink in size.

- Human adults breathe about 23, 000 time a day.

- Human hair and fingernails do not continue to grow after death.

- Humans shed and re-grow outer skin cells about every 27 days - almost 1,000 new skins in a lifetime.

- If you are a universal donor your blood group is type O.

- If your mouth was completely dry, you would not be able to distinguish the taste of anything.

- Insulin is produced in the pancreas.

- Iron deficiency causes the most common form of anemia.

- Some people never develop fingerprints at all. Two rare genetic defects, known as Naegeli syndrome and dermatopathia pigmentosa reticularis, can leave carriers without any identifying ridges on their skin.

- Sperm is the smallest single cell in a man’s body.

- The amount of carbon in the human body is enough to fill about 9 000 'lead' pencils.

- The average adolescent girl has 34,000 underdeveloped egg follicles, although only 350 or so mature during her life (at the rate of about one per month).

- The average height of a man in the Middle Ages was five feet six inches.

- The average human body contains enough: iron to make a 3 inch nail, sulfur to kill all fleas on an average dog, carbon to make 900 pencils, potassium to fire a toy cannon, fat to make 7 bars of soap, phosphorous to make 2,200 match heads, and water to fill a ten-gallon tank.

- The average human brain weighs 1.3 kg

- The average human produces 25,000 quarts of spit in a lifetime, enough to fill two swimming pools.

- The human body transmits nerve impulses at about 90 meters a second

- The human brain is about 80% water.

- The human head is a quarter of our total length at birth, but only an eighth of our total length by the time we reach adulthood.

- The human wrist contains more bones than the ankle.


- The hydrochloric acid in the human stomach is strong enough to dissolve a nail.

- The Islands of Langerhans won't be found on a map, they're a group of cells located in the pancreas.

- The largest cell in the human body is the female ovum, or egg cell. It is about 1/180 inch in diameter. The smallest cell in the human body is the male sperm. It takes about 175,000 sperm cells to weigh as much as a single egg cell.

- The largest human organ is the skin, with a surface area of about 25 square feet.

- The largest muscle in the human body is the buttock muscle.

- The left lung is smaller than the right lung to make room for the heart.

- The left side of the brain is usually responsible for the control of speech.

- The length of your foot is the same length of your forearm between your wrist and the inside of your elbow.

- The little lump of flesh just forward of your ear canal, right next to your temple, is called a tragus.

- The liver is the largest internal organ weighing about 10.5 kilograms.

- The medical term for a black eye is circumorbital haematoma.

- The most common form of cancer is skin cancer.

- The most sensitive cluster of nerves is at the base of the spine.

- The permanent teeth that erupt to replace their primary predecessors (baby teeth) are called succedaneous teeth.

- The smallest bone in the body is the stirrup bone.

- The tips of fingers and the soles of feet are covered by a thick, tough layer of skin called the stratum corneum.

- There are 60,000 miles of blood vessels in the human body.

- There are four main Blood types: A, B, AB and O and each blood type is either Rh positive or negative.

- There are more living organisms on the skin of a single human being than there are human beings on the surface of the earth.

- There are over 100 million light sensitive cells in the retina.

- There is more pigment in brown eyes than blue.

- There is no single word given to describe the back of the knee.

3 comments:

  1. Interesting that the wrist has more bones than the foot - I wouldn't have thought so.

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  2. I was intrigued by the fact that your hair and nails don't continue to grow after you die so I had to look it up because I always heard they do. I found out it is an optical illusion. Your fingers shrink as you decay giving the appearance that your nails are growing, same with your hair. Learn something new everyday!

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  3. Me too, Jane. I enjoy reading about the human body. Some things are quite surprising.

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    That's very interesting, WebDebris! I always find it fun learning new pieces of usesless - but interesting - information.

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