Boss "interstitial cells"
The first thing that appeared was the eldest brother's "interstitial cells", which helped the body to show male characteristics. It is named because it grows in the loose interstitial tissue outside the seminiferous tubule.
Once a man reaches the puberty stage of 12- 14 years old, interstitial cells can produce a lot of testosterone. This androgen can promote the growth and development of male reproductive organs, promote testicular spermatogenesis, and induce and maintain male sexual desire. More significantly, under the action of testosterone, the body can show various masculine characteristics, such as thicker skin, muscular, broad height, strong bones, beard growth, prominent Adam's apple and low voice. Under normal circumstances, testes supply 7 mg of testosterone to human body every day, with an average of 0.6 μ g per 1000 ml of blood.
The second "germ cell"
As the name implies, it is a cell that helps the human body to carry out reproductive activities.
It lives in a curved tube. At the beginning, germ cells grow into primary spermatocytes. After two special mitoses, the primary spermatocytes first become two secondary spermatocytes and then four spermatocytes. After a series of morphological changes, spermatocytes become active sperm. Every gram of testicular tissue can produce 6.5438+million sperm every day, which shows that the sperm yield is amazing. Sperm is the seed of life. Once the eggs meet in the female genital tract, they will "kiss" and fertilize, and a life will be born.
The third "supporting cell"
There are two jobs, logistics and backup.
On the one hand, it provides nutrition for the germ cells of the second brother, on the other hand, it can temporarily replace the interstitial cells of the second brother to produce a small amount of androgen when necessary. The three brothers work together and play an important role in a man's life.
Men's health, let the testicles "quiet down".
Male scrotum has the function of temperature regulation, just like an "air conditioner", which regulates the temperature of the whole reproductive organs. Habits such as riding a horse or driving a car for a long time, wearing thick jeans, putting a laptop on your lap, and sitting on a loose sofa for a long time will all lead to the scrotum being surrounded and oppressed, and the temperature cannot be adjusted normally, which will increase the temperature of the testis and affect reproductive function.
Therefore, it is best for men not to wear tight jeans, and underwear should be loose, comfortable and breathable. Men like taxi drivers and office workers, and it is best to get up every 40 minutes for 8- 10 minutes.