Human testicle,what is the role?

The testicles are elastically suspended.
The testes are a paired organ scale. In medical jargon, the two testicles are called test. The singular form is testis. The testicles are elastically suspended in the scrotum or scrotum. They have a diameter of about 5 cm and are ovate.


During pregnancy, the testicles migrate from the fetal abdomen into the scrotum.
In the womb, the testicles develop in the first body of the fetus at about the level of the lower lumbar spine. From the 3rd Month of pregnancy, the testicles migrate slowly down into the area of ​​the bar. They remain there until the 7th Month of pregnancy. Then pull the testis through the inguinal canal into the developing scrotum. The path is predetermined by a channel (processus vaginalis) of a connection between the abdomen and the scrotum produces. This channel will close when the testicles are passed through the inguinal canal. If not, then it is more common in boys for inguinal hernia in the abdominal organs push through the inguinal canal. At birth, the testes are normally in the scrotum. This is also one of the signs of maturity that will be tested at birth of a (male) child. Are the testicles at birth is not in the scrotum, it should be a treat. There is then the risk of injury with reduced fertility and possible increased cancer risk.


Sperm like it cool.
Unlike the woman in the male germ cells located outside the body. The reason for this is that the maturation of sperm cells is sensitive to temperature. In the abdomen it is too warm. In the scrotum, the temperature is about 2 to 5 degrees lower, and so ideal for the development of sperm.

Inside the scrotum, the testicles are surrounded by a firm capsule of connective tissue. This capsule is divided by about 200 small walls. Then form small chambers, which contain the seminiferous tubules. The seminiferous tubules are highly convoluted and lead to a system of ducts. This system is called the rete testis or testicular network. The seminiferous tubules are lined with germinal epithelium, which is surrounded by a sheath of connective tissue. In the seminiferous epithelium contains Sertoli cells and the precursors of germ cells. From these precursors, the male sperm. The supporting cells are important because they help to nourish the developing sperm cells. The form also the very important blood-testis barrier, which ensures that the sperm cells are not attacked by its own immune system.


Leydig cells produce testosterone.
Between the seminiferous tubules are the so-called Leydig cells. These cells are very important, because in them is the male sex hormone testosterone produced.