Interesting Physiological Facts

The Body of man is made up of many tissues and organs. They number in millions. The cells are organised uniquely and function dynamically together. Their complexities can be better understood when it is closely scanned. Here are some bits of information that are quite interesting.

  1. The stomach takes 20 minutes to tell the brain that is is full and that one should stop eating.
  2. The thickness of the skin varies from 1/2 to 6 mm, depending on the area of your body.
  3. The four taste zones on your tongue are bitter (back), sour (back sides), salty (front sides), and sweet (front)
  4. One uses 14 muscles to smile and 43 to frown.
  5. It takes the interaction of 72 different muscles to produce human speech.
  6. The strongest muscle of the body is the masseter muscle, which is located in the jaw.
  7. The small intestine is about 750 cm long.
  8. The large intestine is 150 cm long and 3 times wider than the small intestine.
  9. Most people shed 20 kg of skin in their lifetime.
  10. When you sneeze, air rushes through your nose at the rate of 156 kmph.
  11. An eye lash lives about 150 days before it falls out.
  12. Our brain sends messages at the rate of 375 kmph.
  13. About 5-6 litres of blood is filtered by 2 million nephrons 37 times a day.
  14. Each of our eyes has 120 M rods, which helps us to see in black & white.
  15. Each eye has 6 M cones, which helps us to see colour.
  16. We blink our eyes about 20,000 times a day.
  17. Our heart beats about 100,000 times day.
  18. Placed end-to-end all our body”s blood vessels would measure about 90,000 kms.
  19. The average human brain has about 100 billion nerve cells.
  20. The thyroid cartilage is more commonly known as the Adam’s Apple.
  21. It is impossible to sneeze with open eyes.
  22. When you sneeze, all your bodily functions stop even your heart.
  23. Babies are born without knee cap. They don’t appear till they are 2-6 years of age.
  24. Children grow faster in spring season.
  25. Women blink twice as much as men.
  26. If one is blind in one eye, he/she only loses about 1/5 vision and the sense of depth.
  27. Our eyes are always the same size from the birth, but our nose and years never stop growing.
  28. The length of the finger shows how fast the fingernail grows. the nail on the middle finger grows fastest. On an average our toenails grow twice as slow as our fingernails.
  29. Hair is made of the same substance as fingernails.
  30. The nose can remember 50,000 scents.
  31. A finger nail takes 6 months to grow from base to tip.
  32. The energy used by the brain is enough to light a 25 watt bulb.
  33. The heart produces enough pressure to squirt blood 900 cm.
  34. We get a new stomach lining every 3-4 days. If we didn’t,the strong acids our stomach uses to digest foods would also digest our stomach.
  35. A pair of feet has 500,000 sweat glands.
  36. Each square inch of human skin consists of 600 cm of blood vessels.
  37. The liver is the only major organ in the human body that can regenerate itself if part of it is removed.