1. 1. The heart beats more than 2.5 billion times in an average lifetime. The human heart creates enough pressure to squirt blood 30 feet.

2. 2. At above 5 feet in length, the large intestine is shorter than the small intestine. However, it is more spacious so it can store and process material that will be eliminated.

3. 3. There are approximately 400 feet of somniferous tubules in the testes of a human male. This is where sperm is stored until it releases 200 million to 500 million sperm, each of which is capable of fertilizing an egg.

4. 4. In the average adult, the skin covers 12-20 square feet and accounts for 12% of body weight.

5. 5. Hundreds of billions of neurons carry electrical signals that control the body from the brain and the spinal cord.

6. 6. When the pituitary gland malfunctions, it can boost or reduce the amount of growth hormone in a growing child’s body, resulting in gigantism or dwarfism.

7. 7. Babies are born without knee caps. They don’t appear until the child reaches 2-6 years of age.

8. 8. The average human will shed over 18 kilograms or 40 pounds of skin in a lifetime.

9. 9. The brain operates on the same amount of power as 10-watt light bulb.

10. 10. The acid in your stomach is strong enough to dissolve razorblades.

11. 11. The human body is estimated to have 60,000 miles of blood vessels. To put that in perspective, the distance around the earth is about 25,000 miles, making the distance your blood vessels could travel if laid end to end more than two times around the earth.

12. 12. The surface area of a human lung is equal to a tennis court.

13. 13. Your left lung is smaller than your right lung to make room for your heart.

14. 14. The adrenal glands change size throughout life.

15. 15. A full bladder is roughly the size of a soft ball.

16. 16. Feet have 500,000 sweat glands and can produce more than a pint of sweat a day.

17. 17. The average person passes gas 14 times each day.

18. 18. The largest cell in the human body is the female egg and the smallest is the male sperm.

19. 19. It takes 17 muscles to smile and 43 to frown.

20. 20. Babies are born with 300 bones, but by adulthood the number is reduced to 206.

21. 21. The strongest muscle in the human body is the tongue.

22. 22. Many of us are obsessed with cleanliness these days and we use antibacterial soaps, wipes and hand sanitizers far more often, than we should. Too much washing and cleansing can actually let bacteria in, because you break down the natural oils in your skin that act as a barrier against bacteria. Viruses also adapt, so if we all stay too clean, they will just become super viruses, so they will still find a way into your body!

23. 23. The kidney can clean more than 1 million gallons of water in a lifetime, which is more than enough to fill a small lake.

24. 24. Red blood cells may live for about 4 months circulating throughout the body, feeding the 60 trillion other body cells.

25. 25. It takes anywhere from two to five seconds for food to make its way down your esophagus into your stomach.

26. 26. In the period of 24 hours, your blood has to pass through the kidneys as many as 300 times!