PELVIS 



569 



been separated, and the right crus should now be cut away from the 

 margin of the pubic arch and the inferior fascia of the uro-genital diaphragm, 

 care being taken to avoid injuring the latter. As the penis is turned 

 down the median and single dorsal vein will be seen to pass backwards, 

 between the arcuate ligament and the upper border of the transverse 

 ligament of the pelvis (which is the thickened upper border of the fasciae of 



Urethra 



Inferior fascia of 

 uro-genital diaphragm / 



Bulb ^r~ 

 Superior fascia ^- 

 of uro-genital 

 diaphragm || 



Levator ani 



-Dorsal vein of penis 



Dorsal artery of penis 

 Dorsal nerve of penis 

 Artery to corpus 

 cavernosum penis 

 Inferior fascia of uro- 

 genital diaphragm 



Crus penis 



FIG. 222. Dissection to show the Dorsal Vessels and Nerves of the Penis 

 and their relations to the layers of the Uro-genital Diaphragm. The 

 upper part of the deep transverse perineal muscle has been left between 

 the layers of the ligament. The lower part has been removed to expose 

 the posterior layer. The lines of the saw-cuts to be made at the next 

 stage of dissection are indicated on the bones by the dotted lines. 



the uro-genital diaphragm), into the pelvis, where it will be followed at a 

 later stage. The dorsal artery and the dorsal nerve of the penis pierce the 

 inferior fascia of the uro-genital diaphragm near the upper part of the lateral 

 border of the pubic arch, and the artery to the corpus cavernosum frequently 

 passes through the diaphragm immediately to the lateral side of the nerve 

 (Fig. 222). The proximal parts of these structures have already been seen 

 in the dissection of the perineum. . The bulb of the corpus cavernosum 

 urethrse should now be carefully detached from the upper part of the inferior 



