Prostatic urethra

Prostatic urethra
The male urethra laid open on its anterior (upper) surface. (Prostatic part labeled at upper right.)
1: Vas deferens 2: Seminal vesicle 3: Base of the prostate 4: Apex of the prostate 5: Prostatic urethra
Details
Identifiers
Latin	pars prostatica urethrae
TA	A09.4.02.004
FMA	19673
Anatomical terminology []

The prostatic urethra, the widest and most dilatable part of the urethra canal, is about 3 cm. long.

It runs almost vertically through the prostate from its base to its apex, lying nearer its anterior than its posterior surface; the form of the canal is spindle-shaped, being wider in the middle than at either extremity, and narrowest below, where it joins the membranous portion.

A transverse section of the canal as it lies in the prostate is horse-shoe-shaped, with the convexity directed forward.

Lobes of prostate

Zones of prostate

Structure of the penis

Vertical section of bladder, penis, and urethra.

Vesiculæ seminales and ampullæ of ductus deferentes, seen from the front.

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)