PELVIS MINOR 



423 



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 deep 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 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 urogenital diaphragm near 

 the anterior part of the margin of the pubic arch, and the deep 



Parietal pelvic fascia 



Seminal vesicle 



Bladder 



Vesical layer of 

 pelvic fascia 



Prostate 



Symphysis 



Pubo-prostatic 

 ligament 



Arcuate ligament 



Transverse liga- 

 ment of pelvis 



Corpus caver- 

 nosum penis f 



Rectum 



Upper fascia of 

 pelvic diaphragm 



Dilatation of urethra in bulb 



Bulb of corpus cavernosum urethrae 



Rectal fascia 



" Recto-vesical fascia 

 Upper fascia of urogenital 

 diaphragm 



Lower fascia of urogenital diaphragm (O.T. lower 

 layer of triangular lig.) 



FIG. 197. Diagram of the Pelvic Fascia as seen in a sagittal section of the 

 Pelvis. Pelvic fascia represented in red. 



artery of the penis frequently passes through the same fascia 

 immediately to the lateral side of the nerve (Fig. 198). The 

 proximal parts of the structures mentioned have already been 

 seen in the dissection of the perineum. The bulb of the urethra 

 should now be carefully detached from the anterior part of the 

 inferior fascia of the urogenital diaphragm and turned down- 

 wards until the urethra is brought into view. The urethra 

 pierces the anterior part of the fascia in the median plane and 

 passes at once into the bulb. 



The muscles and fascia must now be detached from the 

 anterior surfaces and upper borders of the bodies of the pubic 



