PELVIS 593 



wall at the lateral angle, immediately in front of the upper 

 end of the seminal vesicle. Its point of entry into the 

 bladder wall is about one and a half inches (49 mm.) above 

 the base of the prostate, and about two inches from its fellow 

 of the opposite side. It is covered on its anterior and medial 

 surfaces by the peritoneum which it raises into a ridge. To 

 its lateral side, from above downwards, lie the umbilical artery, 

 the obturator nerve, the obturator artery, the inferior vesical 

 artery, and, occasionally, the middle haemorrhoidal artery, but 

 this vessel may pass behind the ureter. 



The obturator vein, which lies at a lower level than the 



Ureter 



Membranous urethra 



FIG. 238. Basal aspect of Bladder, Seminal Vesicles, and Prostate 

 hardened by formalin injection. 



artery, may pass either laterally or medially to the ureter on its 

 way to the hypogastric vein. As a rule there is no vein with 

 the superior vesical artery. The veins which correspond 

 to the inferior vesical and middle haemorrhoidal arteries 

 are irregular in number and large in size ; they emerge from 

 venous plexuses on the walls of the respective viscera, and 

 enclose the lower part of the ureter in tortuous coils as they 

 pass to the hypogastric vein. 



Prostata (Prostate). The prostate is a solid body, partly 

 glandular and partly muscular, which embraces the neck of 

 the bladder and surrounds the first part of the urethra. 



It is conical in shape, with its base directed upwards and 



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