The human body has so many working parts that it’s nearly impossible to fully understand all the systems and how they work to keep us alive and functioning. While we know a lot, such as how important drinking water is and why we need to eat fruits and vegetables, there are so many things your students will be fascinated to learn about their bodies. Here are some facts to get you started!

Fun Facts About the Human Body
  1. The brain weighs about three pounds.
  2. Your mouth makes about one liter of saliva every day.
  3. The average person has 67 different kinds of bacteria living in their belly button.
  4. Women’s hearts beat faster than men’s.
  5. Most people forget about 90 percent of their dreams.
  6. Your skull has 22 bones.
  7. Some scientists believe that right-handed people live about nine years longer than people who are left-handed, though there could be a lot of other factors at play in determining someone’s life span.
  8. You lose almost 9 pounds of skin cells every year.
  9. When you blush, your stomach turns red along with your face.
  10. The only part of the human body that can’t heal itself is your teeth.
  11. Fingernails grow four times faster than toenails.
  12. An adult’s network of blood vessels is more than 60,000 miles long.
  13. About 50,000 of your cells die every 3 to 4 minutes.
  14. An unborn baby has fingerprints three months after conception.
  15. Human bones are five times stronger than steel.
  16. Humans are most likely to have a heart attack on a Monday.
  17. By the age of 60, humans lose about half of their taste buds.
  18. Your left lung is smaller than your right lung.
  19. Human teeth are as strong as shark teeth.
  20. The skeleton contains 206 bones.
  21. The human body has over 600 muscles.
  22. It takes around 17 muscles to smile.
  23. Human tongues have unique prints like fingerprints.
  24. Sneezes can travel up to 20 miles per hour.
  25. The area between your eyebrows is called the glabella.
  26. Many people born with blue eyes have their eyes change color later.
  27. Humans have about 4 pounds of bacteria living on and in their bodies.
  28. Human eyes can distinguish between 10 million different colors.
  29. You burn more calories sleeping than watching TV.
  30. While our nose and ears grow thoughout our lives, our eyes stay nearly the same size they are at birth.
  31. It is nearly impossible to sneeze with your eyes open.
  32. The average adult heart beats about 100,000 times a day.
  33. Skin is the largest organ.
  34. The human nose can tell the difference between thousands of different smells.
  35. Hair grows about a half inch a month.
  36. Your heart is about the size of your fist.
  37. The small intestine is about 20 feet long.
  38. The liver is the largest internal organ.
  39. Humans breathe between 2100 and 2400 gallons of air each day.
  40. Your skin makes up about 8 pounds of your body weight.
  41. Your body replaces your taste buds every ten days.
  42. Only 7 percent of humans are left-handed.
  43. Humans have fewer genes than tomatoes have.
  44. Adults blink 10-12 times per minute, but babies only blink once or twice per minute.
  45. It takes about 12 hours to fully digest your food.
  46. The aorta is the largest blood vessel – it has a diameter of a little more than an inch.
  47. It is impossible to tickle yourself.
  48. Children grow faster in the spring.
  49. One in 2000 babies is born with a tooth.
  50. The average person will walk about 100,000 miles in their lifetime.

These interesting facts are sure to encourage your students to see what else they can learn about how their bodies work!

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50 Mind-Boggling Fun Facts About the Human Body