Testicle (Testis, Pl. Testes, Testicle)

The testicle or ovary is the paired sex glands of animals and humans, which are located in the scrotum area in men and in the labia majora area in women. They perform a reproductive function, producing male or female reproductive cells.

In men, the testicle is a paired sex gland. It consists of two membranes: the outer one, which is called the tunica albuginea, and the inner one, which is called the theca cell membrane. Inside the tunica albuginea there are seminiferous tubules, and inside the theca cell membrane there are convoluted seminiferous tubules.

The testicles produce male reproductive cells - sperm. Spermatozoa are formed by the fusion of spermatogonia with several spermatids. Spermatogonia are cells that are formed in the testicles from stem cells. Spermatids are formed from spermatogonia by meiosis.

In addition, the testicles produce the male sex hormone, testosterone. Testosterone is the main stimulator of the development of male sexual characteristics and male reproductive function. It is also involved in the development of bones, muscles and other tissues.

The testicles are located in the scrotum, which is a cavity formed by skin and muscle. In the scrotum, the testicles are at a higher temperature, which promotes the production of sperm and testosterone.

The testicle is a paired male reproductive gland. It is located in the scrotum and is responsible for the production of male sex hormones such as testosterone. The testicles are formed in the fetal abdomen but descend into the scrotum at birth. The testicle has many lobules, each of which contains long tubules for the production of sperm.

Testosterone is a male sex hormone that is responsible for the development of male sexual characteristics, such as facial and body hair growth, as well as sexual behavior. It also affects muscle mass and strength.

Testicles play an important role in male reproductive function. They produce sperm that enter and pass through the seminiferous tubules to reach the testicular vesicle. Here the sperm mature and prepare to fertilize the egg.