Prostatic urethra

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Prostatic urethra
The male urethra laid open on its anterior (upper) surface. (Prostatic part labeled at upper right.)
Illu quiz prostate01.jpg
1: Vas deferens
2: Seminal vesicle
3: Base of the prostate
4: Apex of the prostate
5: Prostatic urethra
Latin pars prostatica urethrae
Gray's subject #256 1234
Dorlands/Elsevier p_07/12617709

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.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.