Which structure is responsible for the production of sperm in males?

The structure responsible for the production of sperm in males is the testis. The testes are bilateral organs that are part of the male reproductive system and are located in the scrotum. They have specialized cells, specifically spermatogenic cells, which undergo a series of divisions and transformations to produce sperm through a process called spermatogenesis.

Additionally, the testes produce testosterone, which is crucial for the development of male secondary sexual characteristics and also plays a role in the regulation of sperm production. Overall, the testis is fundamental to male fertility, as it is both the site of sperm generation and a source of hormones important for male reproductive health.

The other structures mentioned do not have this function: ovaries produce eggs in females, the uterus is the organ where a fertilized egg implants and develops during pregnancy, and the vas deferens is a tube that transports sperm from the testis to the urethra during ejaculation.