50 Facts About The Human Body

Knoji reviews products and up-and-coming brands we think you'll love. In certain cases, we may receive a commission from brands mentioned in our guides. Learn more.
A look at 50 interesting facts about the human body.

The human body is a fascinating thing. Even though we all have one and use its functions every single day, there is much we do not know about it. Here we will take a look at 50 facts about the human body, some you may already know, some you may not.

  • Blood equates to approximately 7% of the weight of the human body.
  • Over a pint of sweat can be produced from the feet every single day; there are approximately 500,000 sweat glands in the feet.
  • The only living tissue in the human body that does not contain blood vessels is the cornea.
  • The brain contains around 100 billion neurons.
  • The only muscle in the human body that is only connected at one end is the tongue.
  • Everybody knows that a humans fingerprints are unique, but did you know that a tongue print is also unique.
  • It has been estimated that fingerprints start to come through when the foetus is only 3 months old.
  • Hair on the human head grows at a rate of roughly 0.34 millimetres a day – but not on bald people!
  • Madarosis is the technical term for the loss of eyebrows.
  • From the mouth to the stomach, food travels down the oesophagus in around 7 seconds.
  • The average human colon contains over 400 species of bacteria.
  • It takes nearly 12 hours for the body to fully digest any food it has eaten.
  • The average human dream lasts 3 seconds.
  • Around half of the bacteria found in a human mouth resides solely on the top of the tongue.
  • A total of 14 bones make up a human face.
  • Adults have 206 bones in their body but children have 300 bones; as they get older, some of the bones merge together.
  • Most of the dust that exists in your house is nothing more than dead skin cells.
  • The stapes bone in the ear is the smallest bone in the human body.
  • There is enough carbon in the human body to fill 90 pencils.
  • The combined monetary value of all the chemicals in the human body is approximately £4.
  • The hardest substance in the human body is tooth enamel.
  • There are no sensory nerve endings in the human brain, as such it cannot feel pain.
  • The average ear will grow 0.01 inches in length every single year.
  • Every single hour, the human body sheds approximately 600,000 particles of skin.
  • Red blood cells are created in bone marrow and travel around the body for around 120 days.
  • A sneeze travels at around 100mph and it is impossible to sneeze with your eyes open.
  • Hair is the fastest growing tissue in the human body.
  • 400 gallons of blood are filtered by the kidneys every single day.
  • 20% of the oxygen taken in by the human body is used up by the brain.
  • On the subject of the brain – 80% of it is made from water.
  • The small intestine is about 22 feet long and only 2 inches round.
  • Teeth are the only part of the human body that can not ‘fix’ itself.
  • The largest organ of the human body is the skin.
  • The strongest bone in the human body is the femur; it may be hollow but it is as strong as concrete.
  • Give or take a very small distance, your arm span is equal to your height.
  • A human spent around 30 minutes as a single cell!
  • It can take only 60 seconds for a single human blood cell to travel round the human body.
  • The average adult blinks 25 times a minute.
  • A new layer of mucus is produced by your stomach every couple of weeks to stop it from digesting itself.
  • An average person breathes in 11,000 litres of air every single day.
  • The distance between your wrist and the inside of your elbow (where your arm bends) is roughly the same as the size of your feet.
  • The eye sees images upside down but the brain fixes it.
  • The average length of a yawn is 6 seconds.
  • The weight of a human eyeball is approximately 28 grams.
  • Hair on the human head grows at a rate of roughly 0.34 millimetres a day – but not on bald people!
  • The human heart beats approximately 35 million times every year.
  • The human liver performs over 500 functions.
  • It is estimated that nearly two-thirds of the world’s population do not have perfect vision.
  • The fastest growing fingernail is the middle-finger nail.
  • The slowest growing fingernail is the thumb nail.

9 comments

Guest
Posted on Feb 11, 2011
Dione Morrison
0
Posted on May 28, 2010
Anuradha Ramkumar
0
Posted on May 28, 2010
Belinda Dobie
0
Posted on May 28, 2010
Karina Miranda
0
Posted on May 28, 2010
Pat Veretto
0
Posted on May 27, 2010
Patrick Regoniel
1
Posted on May 27, 2010
Alistair Briggs
0
Posted on May 27, 2010
Kaleidoscope Acres
0
Posted on May 27, 2010