15 interesting things about the human body

What do you know about your own body? There are lots of interesting things about yourself that you probably don't know!

1. Gastrointestinal enzymes have a strong acidity that can decompose zinc metal. Fortunately, the cell layer in the stomach always regenerates so quickly that these acids do not have time to decompose.

2. The lungs contain more than 300,000 million small blood vessels. If these blood vessels are connected continuously, they will stretch about 2,400 km.

3. Men's testicles produce 10 million sperms a day. This number is enough to 'regenerate' the population across the planet in just 6 months.

4. Human bones are as hard as granite and cement, a bone the size of a matchbox can bear 9 tons of weight.

5. Nails and toenails take 6 months to grow from the foot of the nail to the top of the nail.

6. The largest organ of the human body is the skin. In adults, the total area of ​​skin covered up to 1.9 m2. In the process from a small to large one, the amount of dead skin is quite large, about . 18kg.

7. When you sleep, your body relaxes about 8mm but when you wake up, your body returns to its height. The reason is because when you stand or sit, the discs are compressed like a sponge by gravity.

8. An average person living in the West consumes 50 tons of food on average and 50,000 liters of water throughout his life.

9. Each kidney in the human body contains 1 million small filters. On average, these filters filter about 1.3 liters of blood / minute and discharge 1.4 liters of urine / day.

10. The muscles around the eyes move about 100,000 times / day. If your leg muscles want a similar 'achievement' , then you have to walk about 80km each day.

11. Within 30 minutes, the human body produces enough heat to boil 2 - 2.5 liters of water.

12. A blood cell takes only 60 seconds to complete a cycle around the human body.

13. Foreskin, the size of the size of a postage stamp, has a rapid growth. In children only takes 21 days to appear a layer of skin that can cover the area of ​​3 basketball courts. And thanks to science, lab-grown foreskin is often used to treat burns.

14. The eyes receive about 90% of information that affects people.

15. Female ovaries contain nearly 500,000 egg cells but only 400 of them have the opportunity to form new living cells.

Mr. Nguyen (General)