The total male genitalia consist of both external and internal parts. The external male genitalia include the penis, urethra, and scrotum. The internal male genitalia include the seminal vesicle, testes, vas deferens, epididymis, prostate, bulbourethral gland, and ejaculatory duct. The penis is the main part of external male genitalia because it has both sexual and bodily functions. It is able to ejaculate semen (containing sperm) during sex and relieve the body of urine. The urethra transports the urine from the bladder, out of the male body. Each male has two scrotum pouches, which house certain parts of the internal male genitalia (epididymis, testes, and lower spermatic cords). The testes are the most important part of internal male genitalia because they make and store sperm, as well as supply the male body with hormones, which control the development of male characteristics and reproductive organs. The epididymis stores, matures, and transports sperm between the testes and the vas deferens, which transports sperm to the urethra. The prostate glands surround the urethra and secrete into a milky fluid (contributed to by the seminal vesicle) discharged through the ejaculatory duct. The bulbourethral gland helps discharge semen.
Written and medically reviewed by the Healthline Editorial Team
In Depth: Male Genitalia