426 



ABDOMEN 



membrane is bound to the muscular coat by the layer of 

 submucous tissue. When the bladder is distended the folds are 

 effaced, and the mucous lining becomes smooth throughout. 



Middle umbilical ligament 



Bladder 



Prostate 

 Pudendal plexus 



Dorsal vein of penis" * 



Levator ani '"" 

 Membranous urethra 



Bulb 4 

 Crus penis - 



Vesical fascia 



Recto-vesical fascia 

 Levator ani 

 Urogenital dia- 

 ihragm (superior fascia) 

 Urogenital dia- 

 phragm (inferior fascia) 



Anal canal 

 Glutaeus maximus 



FIG. 199. Dissection of the Bladder, the Endo-Pelvic Fascia, and the 

 Prostate from the front. The sphincter of the membranous part of 

 the urethra has been removed from between the two layers of the fascia 

 of the urogenital diaphragm. 



Orifices and Trigone of the Bladder. There are three 

 orifices in the bladder wall two orifices of inlet, the orifices 

 of the ureters ; and one orifice of outlet, the orifice of the 

 urethra. They are situated at the three angles of the tri- 

 angular smooth area of the mucous membrane which is 

 known as the Trigonum Vesicce (Trigone of the Bladder]. In 



