It is about 15 cm long, and extends from the termination of the membranous portion to the external urethral orifice.

It is narrow, and of uniform size in the body of the penis, measuring about 6 mm in diameter; it is dilated behind, within the bulb, and again anteriorly within the glans penis, where it forms the fossa navicularis urethrae.

The spongy urethra runs along the length of the penis on its ventral (underneath) surface.

This produces a spiral stream of urine and has the effect of cleaning the external urethral meatus.

[citation needed] Pseudostratified columnar – proximally, Stratified squamous – distally This article incorporates text in the public domain from page 1234 of the 20th edition of Gray's Anatomy (1918)