Which organ is involved in the production of sperm?

The testes are the primary organs responsible for the production of sperm in the male reproductive system. They are located in the scrotum and serve a vital role in producing not only sperm but also hormones such as testosterone, which is essential for the development of male secondary sexual characteristics and reproductive functions.

The process of sperm production occurs through a series of steps known as spermatogenesis, which takes place within the seminiferous tubules found in the testes. This complex process involves the transformation of spermatogonia into mature spermatozoa. The environment within the testes is specifically structured to support the growth and maturation of sperm cells.

In contrast, the uterus is a female reproductive organ where a fertilized egg implants and develops during pregnancy, and the mammary glands are involved in the production of milk for breastfeeding. The prostate gland plays a role in the male reproductive system as well, but its primary function is to produce a fluid that nourishes and helps transport sperm, rather than producing sperm itself. Thus, the testes are the correct answer as they are directly responsible for sperm production.