What organs are parts of the male genital system? What is the function of the testicles?

The organs that are part of the male genital system include the testicles, epididymis, vas deferens, prostate gland, seminal vesicles, and penis.

The main function of the testicles is to produce sperm and testosterone. Sperm is produced in the seminiferous tubules within the testicles, while testosterone is produced in the Leydig cells. Testosterone is a male sex hormone that is responsible for the development of male reproductive organs, secondary sexual characteristics, and plays a role in maintaining muscle mass, bone density, and libido.