The human body is a great machine, filled with various chemicals, and its parts can cooperate accurately. It can produce many things, from sweat to memory. It has many secrets you don’t know.
1. Your skin has four colors
The skin may be milky white. Blood vessels in the epidermis add red to the skin. Yellow also adds some background color. Finally, there is black to deal with ultraviolet rays. These four colors are mixed in different proportions to produce the skin tones of all people in the world.
2. Laughter can also infect people.
Just as yawning can be contagious, the latest evidence shows that laughter can also be contagious. In fact, hearing laughter can stimulate areas of the brain related to facial expressions. In social communication, imitation plays a very important role. Sneezing, laughing, crying and yawning may be a way to establish social relations.
3. Large head causes small mouth
Evolution is sometimes not perfect. If something goes wrong, maybe we will have wings instead of wisdom teeth. Sometimes useless tissues remain in the species because they are harmless. In the early days, wisdom teeth were used as molars for the third batch of shredded meat. However, the growth of the brain led to changes in the structure of our mandible, which made our mouth very narrow and crowded.
4, nose inner cell cilia discharge nasal mucus
There are many cells called cilia in our body, which are helpful to the functions of many organs. In the nose, cilia can help discharge nasal mucus from the nasal cavity to the throat. Cold weather can slow down this discharge process, leading to mucus blockage and continuous nasal discharge.
5. Adolescence reshapes brain structure, leading to emotional agitation
We know that hormone changes in the body can promote growth and prepare for childbirth, so why is adolescence always so emotional and irritable. In fact, hormones like testosterone affect the development of neurons in the brain, and their changes can reshape the brain structure, leading to many behavioral changes.
6. Thousands of eggs are not used by ovaries
When a woman reaches the age of 50 or so, the monthly menstruation that controls hormones and fertility gradually disappears. Her ovaries produce less and less estrogen, and her immature eggs are no longer regularly discharged into the uterus as before. On average, a young woman has 34000 undeveloped follicles. However, only 350 follicles have matured in her whole life. Unused follicles begin to degenerate, and then they can no longer conceive, and the brain will control and stop ovulation.
7. Eating mainly provides energy for the brain
The brain is only 2% of the weight of our whole body, but it needs 20% of the oxygen and calories of the human body. To ensure that our brain has enough energy, the three main cerebral arteries constantly deliver oxygen. If one of the arteries stops or blocks a little, it will cause brain cells to lack energy and destroy the work there. This is what we call a stroke.
8. Bones can decompose and balance the human body minerals
Research shows that in addition to supporting the body and muscles, our bones can also regulate our calcium content. Bones contain phosphorus and calcium. When the calcium content decreases, certain hormones will cause bones to decompose and increase the calcium content of bones until they reach the necessary standard.
9. Body posture affects your memory.
Do you remember your wedding anniversary, dear? Kneel down on one foot and propose to me. Memory is deeply imprinted on our senses. A smell or a sound can evoke memories of our childhood in the distant past. This connection can be obvious or unpredictable. For example, a bicycle bell can wake up a memory in the past. A recent study explains this. An article published in cognition magazine in January 2007 said that when a person’s body posture is similar to the one that impressed him deeply at that time, he can wake up his memory faster and better.
10, mysterious corrosive acid in the stomach
In fact, each of us carries a dangerous liquid. Even the security check at the airport can’t take it away from you, because it exists in your internal organs, which is hydrochloric acid in your stomach. It is often used in industry to treat metals. It can be used to chromate steel. In our stomach, this venom can be safely stored in our digestive system to decompose the food in your stomach.
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