PELVIS MINOR 



427 



that area the mucous membrane is always smooth, whether 

 the bladder is distended or empty, on account of the close 

 connection which exists between the mucous and muscular 

 coats. At the inferior angle of the area is the internal 

 urethral orifice, semilunar or V-shaped in outline, with a 



Middle umbilical ligament 



Peritoneum 



Trigone 

 Uvula vesicae 



Urethral crest 



Utriculus prostaticus 



with the openings of 



the ejaculatory ducts 



at its margins 



Membranous urethra 



Dilatation of urethra 



in the bulb 



Ducts of bulbo- 



urethral glands 



Wall of bladder 



Ureter 



Recto-vesical fascia 

 Pudendal plexus 

 Levator ani 

 Prostate 



Urogenital 

 diaphragm 

 (superior fascia) 

 Urogenital 

 diaphragm 

 (inferior fascia) 



FIG. 200. Dissection of Bladder and Urethra from the front. The 

 sphincter of the membranous part of the urethra has been removed 

 from between the two fasciae of the urogenital diaphragm. 



slightly elevated posterior lip, which is known as the uvula 

 of the bladder (Figs. 189 and 200). The elevation indicates 

 the position of the middle lobe of the prostate gland below. 

 When the bladder is empty and contracted a number of radial 

 ridges of mucous membrane diverge from the margins of the 

 orifice. 



