Amazing things about the human body

People with about 50 trillion cells are an extremely complex living organism, containing many unexplored mysteries.

1. Strong heart. In one day, the heart beats about 100,000 times on average to transport more than 7,500 liters of blood to feed the body.

2. Very large circulatory system. Blood in the body moves in a network including arteries, capillaries and veins. In adults, if stretched out and joined together, the length will be about 96,000km. This means that the total length of an adult's blood vessels is 2.5 times that of the earth's circumference.

3. Two miraculous kidneys. Each kidney consists of a million units of dialysis called nephrons. Kidneys can purify 120-150 liters of blood each day and produce about 2 liters of urine.

4. Length of intestine. The total length of the intestine is about 7.5m, approximately 4 times the height of an adult. Fortunately, they are located in a very neat abdominal cavity.

The human body has many mysteries.(Artwork: Tiffan Terry / Flickr)

5. Excessive saliva. People have salivary glands around the mouth and throat, help wet food, initiate digestion and help protect teeth from decay. On average, an adult produces about 1.8 liters of saliva every day.

6. The amazing speed of a sneeze. A sneeze can release 40,000 droplets into the air at a speed of 160km / h. So we should cover our mouths when sneezing to avoid affecting others.

7. Body odor. Each person has a completely unique smell, this is similar to fingerprints, except for identical twins they may have the same smell.

8. Area of ​​skin . An adult's skin has an area of ​​about 2 square meters and weighs 4kg.

9. Skin eliminates continuous cell death. People remove about 50,000 dead skin cells every minute. The total amount of dead skin in the earth's atmosphere is estimated at 1 billion tons.

10. The amount of hair on the body. Humans look smoother and less hairy than other primates. However, in fact, the number of human hairs is on par with a chimpanzee.

11. The energy of the body. The heat generated by a body depends on the weight and activity level. An average person consumes 2,400 kcal per day, the amount of heat generated is about 100 kcal per hour, equivalent to the energy that lights a 116W light bulb.

12. The ability to smell. The human brain can process about 10,000 different odors in a brain area the size of a postage stamp.

13. Tongue is like an octopus tentacle. Tongue forms from 8 separate muscles. Unlike other muscles, the tongue is not supported by a skeleton, they are intertwined and create a flexible tongue. This structure resembles an elephant's tent or tentacles.

14. Number of atoms on the body. An adult is made up of about 7 × 10 ^ 27 (7 octillion) atoms.

15. The chemical elements that make up the body. Humans are made up of six main elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Among them, the three largest elements are oxygen (65%), carbon (18.6%), hydrogen (9.7%).

16 . The human eye is extremely sensitive, imagine if the Earth is flat, you can see a flickering background in the night up to 30 miles away.

17 . The nerve impulses move to and from the brain at a rate of 250 miles per hour, faster than speed compared to a Formula 1 racing car.

18 . The human brain can read 1000 words per minute.

19 . Your umbilical cord contains thousands of bacteria, which can form the same size as an ecosystem.

Umbilical cord contains a lot of bacteria.

20 . A hair can lift 12 tons of weight.

21 . In about 30 minutes, humans can produce enough heat to boil 1 liter of water.

22 . The atoms that make up the human body today are atoms formed in Big Bang 13, 7 billion years ago.

23 . Human bones are as hard as granite, a bone block with the size of matchbox can support 9 tons.

24 . If the human brain is like a computer, can perform 38,000 trillion calculations per second, the world's most powerful supercomputer BlueGene can only manage 0.002% of them.

25 . In one day, the blood went 12,000 miles around the body.

26 . The neuron connecting the brain is similar to the structure of the universe.

27 . The human body can produce 25 million cells per second.

28 . The human body can be bioluminescent, the light we emit is 1,000 times weaker than the normal light that human eyes can sense.

29 Inside the human body there are about 0.2 milligrams of gold, especially in blood, and you approach about 40,000 people to collect enough gold for an 8g coin.

30 The human brain needs to use 20% of the body's oxygen and calories, although it only accounts for 2% of adult body mass.

31 . Some women are more likely to see colors than the average person, most people will have 3 types of bodies to perceive color, but many women have 4 or 5 receptors.

31 . Crying helps relieve stress and allows people to be aware of anger or sadness. The structure of tears will be different, depending on why we cry.