Skip to main content
An official website of the United States government
Español

penis

(PEE-nis)
An external male reproductive organ. It contains a tube called the urethra, which carries semen and urine to the outside of the body.
More Information
Anatomy of the penis; drawing shows the base, shaft, glans, foreskin, and urethral opening. Also shown are the scrotum, prostate, pubic bone, and lymph nodes. An inset shows a cross section of the inside of the penis, including the blood vessels, dorsal nerve, connective tissue, erectile tissue (corpus cavernosum and corpus spongiosum), and urethra.Enlarge this image in new window
Anatomy of the penis. The parts of the penis are the base, shaft, glans, and foreskin. The tissues that make up the penis include the dorsal nerve, blood vessels, connective tissue, and erectile tissue (corpus cavernosum and corpus spongiosum). The urethra passes from the bladder to the tip of the penis.
Search NCI's Dictionary of Cancer Terms