MALE PERINEUM 



171 



diaphragm is attached to the medial surfaces of the rami 

 of the pubis and ischium. Its base has already been seen 

 to blend, along the posterior border of the superficial 

 transversus perinei muscles, with the fascia of Colles. In 

 addition to that attachment, however, a careful dissection, 

 in a good subject, will show that the central part of the 

 base projects backwards 



Corpus 

 cavernosum penis 



\ 



in the form of a short 

 process which joins the 

 central point of the perin- 

 eum. Near the symphysis 

 pubis the anterior margin, 

 fused with the anterior 

 margin of the superior 

 fascia of the diaphragm, 

 forms the transverse liga- 

 ment of the pelvis. Be- 

 tween the anterior border 

 of the transverse ligament 

 and the arcuate ligament, 

 which covers the inferior 

 aspect of the symphysis 

 pubis, an oval gap is left 

 for the passage of the 

 dorsal vein of the penis. 



In the erect posture of 

 the body the superficial 

 surface of the urogenital 

 diaphragm looks down- 

 wards and forwards, whilst 

 its deep surface looks 

 upwards and backwards 



Glans penis, 

 formed by the 

 anterior part of 

 the corpus 

 cavernosum 

 urethrae 



Body of corpus 

 ^ cavernosum 

 urethrai 



- Ureter 



Bulb of urethra 



Left crus penis 



FIG. 82. Component Parts of Penis, 

 towards the cavity of the A. Corpus cavernosum penis and the crura 



pelvis. In close contact P enis - seen from the ri ht a " d below - 



r . , . . r . - . Showing the groove for the corpus 



With Its inferior fascia are cavernosum urethrae. 



the parts which Constitute 13. Corpus cavernosum urethra. 



the root of the penis, 



viz., the bulb and the two crura, and the muscles which are 



associated with them, and also the superficial transversus perinei 



muscle on each side. The structures which lie between 



its two fasciae will be studied after the inferior fascia is 



reflected. 



