20 amazing things about the human body

Human body parts have amazing structures and capabilities that not everyone knows about.

1. The digestive acid in your stomach is strong enough to dissolve zinc. However, the cells in your stomach lining are replaced so quickly that the acid doesn't have time to dissolve them.

2. The lungs contain more than 300,000 million capillaries (tiny blood vessels). If they were connected end to end, they would be 2,400 km long.

3. A man's testicles produce 10 million new sperm cells every day, enough to populate the world in just 6 months.

4. Human bones are as strong as granite when it comes to supporting weight. A matchbox-sized block of bone can support a 9-ton object (that's 4 times what a block of concrete the same size can support).

5. Fingernails and toenails grow from base to tip in 6 months.

6. The largest organ in the human body is the skin. An adult man has a skin area of ​​about 1.9 m2. During a person's lifetime, the skin continuously sheds about 18 kg.

7. When sleeping, people can increase their height by about 8 mm. The next day, their height will return to its previous state. Scientists explain that the cartilage discs are compressed like sponges due to gravity when people stand or sit.

8. On average, a Western person eats 50 tons of food and drinks 50,000 liters of liquid in a lifetime.

9. Each human kidney has one million separate filters. It filters an average of about 1.3 liters of blood per minute and excretes 4 liters of urine daily.

10. The muscles in the eyes move about 100,000 times a day, which is equivalent to the muscles in the legs walking 80 km a day.

11. In 30 minutes, the average body generates enough heat to boil 1.9 liters of water.

12. It takes only about 60 seconds for a single human blood cell to make a complete circuit in the human body.

13. Humans are fundamentally visual creatures. The eyes receive nearly 90% of all the information humans receive from their surroundings.

14. A woman's ovaries contain nearly half a million egg cells, but only about 400 have a chance of creating a new life.

15. Similar to fingerprints, each person has a unique tongue print.

16. Adults have fewer bones than babies. At birth, humans have 350 bones, but they fuse together during development, leaving only 206 bones.

17. Although our sense of smell is not as sensitive as that of a predator, it can remember up to 50,000 different scents.

18. The small intestine is four times the length of an average adult. If it weren't neatly packed in the abdominal cavity, it would get quite messy.

19. Every 6.45 cm2 of skin contains about 32 million bacteria. However, most of them are harmless.

20. During a lifetime, the average person produces 25,000 liters of saliva, enough to fill two swimming pools.

According to VNE