What is the function of a testicle?

The function of a testicle primarily revolves around the production of male gametes, which are sperm cells. Testicles are key organs in the male reproductive system, and their primary role is to produce testosterone and sperm through a process known as spermatogenesis. Testosterone is crucial for the development of male secondary sexual characteristics and plays a significant role in fertility.

In contrast, the other options relate to different systems or functions in the body. Female hormones are produced in the ovaries, not testicles. Urine storage is a function of the bladder, while blood sugar regulation is primarily managed by the pancreas, not the testicles. By understanding the specific roles of reproductive organs, we can appreciate the central importance of testicles in male reproduction.