Why is the male testicle missing? Why the boy's testicles are looming
The upper and lower testicles are located in the scrotum, one at the upper and one at the lower. Their important role is to cause male sperm and metabolize male hormones. During infancy, the testicles are located in the retroperitoneal space of both sides of the abdomen. With the continuous growth and development of the baby, the retroperitoneal sheath is advanced to the groin than the testicles, and the testicles drop again according to the inguinal tube. After birth, they generally drop to the scrotum, where they live.
Although some children's testicles fall into the scrotum, they can only be contacted during hot weather and bathing, and they can not be contacted most of the time. This is known in medicine as contracting testicles or wandering testicles. The testicles swim between the abdomen and the groin, between the groin and the scrotum, and can also stay at the left and right positions of the groin. The testicles swim because of the effect of testicular muscle contraction. Testicular muscle is the thin body muscle on the testicle that tightly surrounds the sperm curve, which can improve the testicle and help adjust the temperature. When the average temperature is too low or the scrotum is severely hit from the outside, the testicular muscle is too strong and obviously constricted. The testicles contract from the scrotum to the groin and into the abdomen. At this time, of course, you can't touch the testicles in the scrotum.
The compressive strength of testicular muscle contraction varies greatly with the age of children, and most of the testicular muscle contraction in infants. After 3 months, the compressive strength of shrinkage gradually increased, which was obvious from 12 to 18 months, and most obvious from 5 to 6 years old. After the age of 6, the contractive effect of the testis gradually weakened, and the testis also appeared. At puberty, the testicles will drop to the lower part of the scrotum. Therefore, children's testicular migration is all normal physiological conditions, and it is not easy to endanger the fertility of adults.
Warm little indication:
The important difference between the two is that the contracted testis can sometimes be contacted in the scrotum. Even if it is contracted to the groin, the testis can also be input into the scrotum. If the testis is not input into the scrotum, the testis cannot be input into the scrotum.