Crus of penis
|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.)
|Lymph||superficial inguinal lymph nodes|
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 ischial rami.
Traced from behind forward, each crus begins by a blunt-pointed process in front of the tuberosity of the ischium, along the perineal surface of the conjoined (ischiopubic) ramus.
Beyond this point the crus undergoes a constriction and merges into the corpus cavernosum proper, which retains a uniform diameter to its anterior end.