What is the primary function of the testis?

The primary function of the testis is to produce sperm and hormones, making it essential for reproduction and sexual development. The testis is responsible for spermatogenesis, the process of sperm production, which occurs within the seminiferous tubules. Additionally, it produces important hormones, primarily testosterone, which plays a key role in the development of male secondary sexual characteristics, such as increased muscle mass, body hair growth, and deeper voice.

While the testis does play a role in storing sperm temporarily within the epididymis and is involved in transporting sperm during ejaculation, these functions are secondary compared to the crucial roles of sperm and hormone production. Understanding these primary functions highlights the significance of the testis in the male reproductive system.