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  • Writer's pictureProject STEMinist

30 Fun Facts about the Human Body!

1. Your mouth produces about 1⁄4 of a gallon of saliva each day.

2. An adult’s blood vessels, laid end to end, could circle the Earth’s equator around 4 times.

3. The word “muscle” comes from the Latin word, ​musculus​, meaning “little mouse” because that is what Ancient Romans thought flexed bicep muscles looked like.

4. You lose about 9 pounds of skin cells every year.

5. Babies do not shed tears until they are at least one month old.

6. The human heart beats more than three billion times in an average lifespan.

7. Human teeth are as strong as shark teeth.

8. Humans are the only species known to blush. #rosycheeks

9. Your left lung is about 10% smaller than your right lung to make room for the heart.

10. You’re a little taller in the morning because of how the cartilage in your bone compresses throughout the day due to gravity.

11. Your highest blood flow is in the kidneys.

12. Your body has more than 600 muscles. #STRONG

13. The strongest muscle in the body based on its weight is the masseter, which runs vertically from in front of the ear to the angle of the jaw.

14. The smallest bone in the body is the stapes, a stirrup-shaped bone in the middle ear.

15. The fastest growing organ (and the largest organ) of the body is the skin.

16. An adult brain weighs about 3 pounds (If you hold your fists together with your thumbs touching, that is about the size of your brain!). #WOW

17. It takes around 60 seconds for blood to leave the heart, circulate around the body, and then return to the heart.

18. An average person can hold their breath for about 2 minutes.

19. The small intestine, which is a part of the human digestive system, is 16-20 feet long in an adult.

20. Though the small intestine is longer than the large intestine, the small intestine is called “small” because it’s less thick compared to the large intestine.

21. A baby has 300 bones as birth, but since some of those bones fuse, the average adult only has about 206 bones. #babybones

22.The largest and strongest bone is the femur (thigh bone).

23. The average human head has about 100,000 hairs.

24. The cornea is the only part of the body that has no blood supply and instead receives oxygen directly from the air.

25. Women’s hearts beat faster than men’s hearts.

26. The average person forgets 90% of their dreams. #creativity

27. The scientific name for the belly button is the umbilicus.

28. Teeth are the only part of the body that cannot heal themselves.

29. Nerve impulses in the human body move at about 90 meters per second.

30. Humans have about 2,000 taste buds. #flavortown

BY: Richa Kuklani

References: “15 Facts About The Human Body!” ​National Geographic Kids,​ 2 June 2020, 99 Quick and Fascinating Facts About the Human Body​. 22 Mar. 2017, “The Human Body Facts, Worksheets & Key Systems For Kids.” ​KidsKonnect,​ 10 Dec. 2019, Salcedo, Susy. “Do You Know These Fun Facts About the Human Body?” ​Nectar Sleep​, 4 Nov. 2019,

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