352 



ABDOMEN 



Dorsal 

 vein 



Dorsal nerve 



Corpus caver- 

 nosum urethrse 



urethra, the bulbo-urethral glands (Cowper's), the terminal 

 parts of the internal pudendal vessels and some of their 

 branches, and the dorsal nerves of the penis. The blended 

 anterior margins of the inferior fascia of the urogenital dia- 

 phragm (O.T. superficial layer of the triangular ligament), and 

 the superior fascia of the urogenital diaphragm (O.T. deep layer 

 of the triangular ligament) form the transverse ligament of the 

 pelvis, and their blended posterior margins form the base of 

 the urogenital diaphragm (triangular ligament). The space 

 between the two layers is spoken of as the deep compartment, 



or pouch, of the urethral 

 triangle, and the area en- 

 closed between the lower 

 fascia of the urogenital 

 diaphragm and the fascia 

 of Colles is the superficial 

 pouch. This latter pouch 

 has already been opened, 

 and the superficial vessels 

 and nerves which form 

 part of its contents have 

 been displayed. The root 

 of the penis also lies 

 within the superficial area 

 of the urethral triangle, in relation with the inferior aspect 

 of the lower fascia of the urogenital diaphragm. 



With the handle of the knife clear away, for a short 

 distance, the loose tissue which surrounds the body of the 

 penis, which will then be seen to consist of two masses; a 

 superior, the corpus cavernosum penis, and an inferior, the 

 corpus cavernosum urethra. The corpus cavernosum penis 

 forms the main mass of the anterior two-thirds of the penis. 

 It has the form of a flattened cylinder grooved upon its 

 superior and inferior surfaces. Anteriorly the corpus 

 cavernosum is partially separated into two lateral halves by 

 a perforated septum. Posteriorly, at the apex of the pubic 

 arch, it divides into two lateral portions the crura of the penis. 

 The groove on the superior surface lodges the dorsal vessels 

 and nerves of the penis, and the corpus cavernosum urethrse 

 lies in the deeper groove on the inferior surface. Immedi- 

 ately behind the point where it diverges from the corpus 

 cavernosum penis each crus is slightly dilated, thence, back- 



Urethra 



FIG. 131. Transverse section through 

 the body of the Penis. 



