Structures of the Male Reproductive System 1.External Genitalia •The penis contains three columns of erectile tissue and the urethra, which terminates at the glans. •The scrotum is divided by a septum. Each scrotal sac contains a testis, epididymis, and vas deferens. •The testes are two ovoid glands that contain seminiferous tubules, in which spermatogenesis occurs, [...]