Crus of penis

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Crus of penis
The constituent cavernous cylinders of the penis. (Crus labeled at bottom left.)
Vertical section of bladder, penis, and urethra. (Crus penis labeled at bottom center.)
Latin crus penis
Gray's subject #262 1248
Lymph superficial inguinal lymph nodes
Dorlands/Elsevier c_64/12268312

For their anterior three-fourths the corpora cavernosa penis lie in intimate apposition with one another, but behind they diverge in the form of two tapering processes, known as the crura, which are firmly connected to the rami of the pubic arch.

Traced from behind forward, each crus begins by a blunt-pointed process in front of the tuberosity of the ischium.

Just before it meets its fellow it presents a slight enlargement, named by Georg Ludwig Kobelt (1804-1857) the bulb of the corpus cavernosum penis.

Beyond this point the crus undergoes a constriction and merges into the corpus cavernosum proper, which retains a uniform diameter to its anterior end.

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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 As such, some of the information contained herein may be outdated.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.