What are testicles?

The testicles grow inside the male scrotum, one on each side. The diameter of the testicles is about one centimeter, and they are oval in shape. The surface of the testicles is very smooth, and they are surrounded by free tissues. The testicles are connected to the epididymis and the vas deferens. The testicles grow together with the process of male sexual maturity, and the testicles will shrink accordingly as the male sexual function gradually declines. The part of the testicle that can produce sperm is the seminiferous tubules of the testicles, and the sperm is stored inside the epididymis segment of the testicle after production.

The testicles must be below body temperature to produce normal sperm. The testicles are first formed in the embryo, and during the embryonic development, the testicles gradually begin to move down to the final position. If some babies develop abnormally, after they are born, the testicles have not descended to the place they should be, and surgery is required. If surgery is not performed, testicular cancer may occur. And it must be done early. If the testicles are too high in body temperature after a certain age, the man may lose his fertility.

If men often wear tight underwear, the testicles will be tightly wrapped by the underwear, and the temperature will be the same as the body temperature, which will affect the quality and quantity of sperm, and thus affect reproductive ability. When the weather is hot, the testicles will sag. When the weather is cold, the testicles will shrink to a place close to the body. When approaching the climax of sexual intercourse, the testicles will also rise to a place close to the body due to muscle contraction.

The testicles have a thick fibrous membrane that divides the testicles into many testicular lobules. The connective tissue between the seminiferous tubules in the testicular lobules contains interstitial cells that secrete male hormones. Once men enter puberty at the age of 12-14, interstitial cells can produce a large amount of testosterone. Testosterone is the main component of male hormones and has extremely important biological effects in the human body. It is currently believed that the reason why testosterone levels gradually decrease with age may be related to the aging of the testicular system due to daily wear and tear of the human body and excessive stress in life.

The level of testosterone produced by the testicles begins to rise during puberty, reaches a peak in men between the ages of 20 and 30, and gradually decreases after the age of 40. As testosterone levels change, male sexual ability also changes. Testicular health is directly related to male reproductive health and male sexual ability. Therefore, men should always pay attention to testicular health.