1. The only part of the body that has no blood supply is the cornea of the eye. It receives oxygen directly from the air.
  2. The human brain has a memory capacity which is the equivalent of more than four terabytes on a hard drive.
  3. A single human brain generates more electrical impulses in a day than all of the telephones of the world combined.
  4. The average human body contains enough Sulphur to kill all of the fleas on the average dog, enough carbon to make 900 pencils, enough potassium to fire a toy cannon, enough fat to make seven bars of soap, and enough water to fill a 50-litre bottle.
  5. 50,000 cells in your body died and were replaced by new ones while you were reading this sentence.
  6. On average, a person’s respiration rate is one third higher in spring than in autumn.
  7. By the end of a person’s life, they can recall, around 150 trillion pieces of information.
  8. When you blush, your stomach also turns red.
  9. A feeling of thirst occurs when water loss is equal to 1% of your body weight. The loss of more than 5% can cause fainting, and more than 10% causes death from dehydration.
  10. Not only human being, but also koalas have unique finger prints.
  11. Everyone alive on Earth could comfortably be placed into a cube with sides 1000 meters long.
  12. The fragrance of apples and bananas can help a person to lose weight.
  13. If allowed to grow for their whole lifetime, the length of someone’s hair would be about 725 kilometers.
  14. Human beings are the only animals which can draw straight lines.
  15. Human skin is completely replaced about 1,000 times during a person’s lifetime.
  16. A person who smokes a pack of cigarettes a day is doing the equivalent of drinking half a cup of tar a year.
  17. Women blink about two times less often than men.
  18. People with blue eyes are more sensitive to pain than others.
  19. Everyone has dimples on their lower back, but on some people they are more pronounced than on others. They appear where the pelvis joins with the sacrum, so their appearance makes sense.
  20. The surface area of the human lungs is approximately equal to the area of a tennis court.
  21. At birth, a child’s body is made up of around 300 bones. But an adult has just 206.
  22. An adult person performs around 23,000 inhalations and exhalations a day.
  23. The human heart pumps blood at such pressure that it would be able to raise blood up to the fourth floor of a building.
  24. A person burns more calories when they are asleep than when they watch TV.
  25. A person uses 17 muscles when they smile, and 43 when they frown.
  26. The rate at which a person’s hair grows doubles during an airplane flight.
  27. Statistically, only one person out of two billion reaches the age of 116 years old.
  28. On average, a person says 4,800 words in 24 hours.
  29. In the morning, a person is about 8 millimetres taller than in the evening.
  30. During their lifetime, a person will on average accidentally swallow eight small spiders.