This document describes the anatomy and functions of the male reproductive system. It discusses the testes, epididymis, vas deferens, seminal vesicles, ejaculatory ducts, prostate gland, and urethra. The testes produce sperm which travel through the epididymis, vas deferens and seminal vesicles where they mature and mix with fluids. The prostate gland surrounds the urethra and produces fluid that joins the semen. During ejaculation, sperm and fluids pass through the urethra and exit the body.