ANATOMY

Detailed explanation-1: -The testes secrete testosterone, which is necessary for proper physical development in boys. In adulthood, testosterone maintains libido, muscle strength, and bone density. Disorders of the testes are caused by too little testosterone production.

Detailed explanation-2: -They contain very fine-coiled tubes, called seminiferous tubules and are covered with tough membrane, tunica albuginea. Primary cell types in testes are germ cells, Sertoli cells which secrete inhibin, Leydig cells which produce and secrete androgens, peritubular hyoid cells, macrophages and epithelial cells.

Detailed explanation-3: -The Testis has following three functions. First, it produces spermatozoa, the male gametes. Second, it synthesizes testosterone, the principal male sex hormone. Third, it participates with the hypothalamus-pituitary unit in regulating reproductive function.

Detailed explanation-4: -The testes are responsible for making testosterone, the primary male sex hormone, and for producing sperm. Within the testes are coiled masses of tubes called seminiferous tubules. These tubules are responsible for producing the sperm cells through a process called spermatogenesis.