Why do testicles and scrotum move by themselves? Stretch and shrink ~

Scrotum is also a man's external genitalia, located on the body surface and below the penis. It is a soft and elastic pouch composed of skin, muscle and so on. Like two hammocks hanging in the forest, there are testicles, epididymis and so on. It's packed. There is a scrotal septum in the scrotum, which divides the scrotal cavity into left and right parts, each containing a testis and epididymis.

The function of scrotum is not only to protect the external barrier of testis, but also to regulate the temperature from the perspective of fertility, so that the testis inside can be protected at a suitable temperature.

(generally lower than the temperature in the abdominal cavity.

1 ~ 2℃) to produce sperm. As long as you observe carefully, you can find that when you are in a cold environment, the scrotum skin will shrink and thicken, which will make the scrotum tense and reduce the surface area. At this time, the temperature of testis in scrotum can be protected from decreasing. On the contrary, in the high temperature environment, the scrotum skin will relax and wither, making the scrotum droop and the surface area increase. At this time, it will help to radiate the body temperature, prevent the temperature in the scrotum from rising, and protect the testis from producing sperm in a normal and suitable temperature environment. Therefore, the contraction and relaxation of scrotum is a normal physiological regulation phenomenon. In this way, the temperature in the scrotum is basically at

About 35℃, so that organs such as testis can maintain normal function. This is true of all men with normal development. Because many people don't understand this truth, they often see the scrotum contract and relax, which is very common in clinical patients. For example, some men mistakenly think that the scrotum is smaller and the testicles are smaller, and even mistakenly think that they are stunted and afraid of infertility. In fact, this situation is just an illusion caused by the function of scrotum lifting and contracting, which makes the testicles rise close to the groin and not easy to touch all. Some people mistake scrotal prolapse as a sign of weakened sexual ability, and they are worried, which is even more nonsense.