Anus
The opening at the end of the alimentary canal.

Bulbourethral gland
Pair of glands below the prostate that secretes fluid in the urethra during sexual arousal.

Corpus cavernosum
A pair of spongy cilinders in the penis that fill with blood during an erection.

Corpus spongiosum
The mass of sponge-like tissue surrounding the urethra within the penis.

Ductus deferens
Muscular tubes that transport sperm cells from the epididymis to the urethra.

Epididymis
Tightly coiled tubes that store sperm, promote sperm maturation and transport it from the testes to the ductus deferens.

Glans penis
The cone-shaped structure at the end of the penis that is the human male's most sensitive erogenous zone.

Prepuce
The prepuce (foreskin) is a retractable fold of skin which covers the glans penis.

Prostate gland
Gland below the male urinary bladder that adds secretions to the semen prior to ejaculation.

Pubic symphysis
The joint between the pubic bones.

Scrotum
Pouch of skin that encloses the testis.

Seminal vesicle
Pair of glands below the urinary bladder that secrete fluid - containing nutrients - in the ductus deferens, where it becomes part of the sperm.

Testis
Sperm-cell producing organ in males. The scrotum contains two testes.

Urethra
Tube leading from the urinary bladder to the outside of the body.

Urinary bladder
Hollow organ that stores urine from the kidneys before disposal by urination.