412 



ABDOMEN 





ductus deferentes, towards the base of the bladder. The 

 prostate lies below the bladder and encloses the prostatic 

 part of the urethra (Fig. 190). 



The Pelvic Peritoneum. The peritoneum passes into the 

 pelvis minor through the superior aperture, and gives partial 

 or complete coverings to various viscera. It covers the upper 

 surface of the bladder, and passes from the lateral borders of 

 that surface to the side walls of the pelvic cavity, as the lateral 



r-iffl 



Ductus deferens 



crossing side wall 



of pelvis 



Paravesical fossa 



Reflection of 

 peritoneum 



Empty bladder 



Symphysis pubis 



Sacro-genital 

 fold 



Bulb of the urethra 



Bulbo-cavernosus 

 muscle 



Bulbo-urethra 



gland 



Sphincter ani 

 internus 

 Sphincter ani 

 externus 



FiG. 190. Median section through the Male Pelvis. The bladder, which is 

 empty, does not present the usual form. 



false ligaments of the bladder. Turning over the posterior 

 border of the upper surface of the bladder, it descends, for a 

 slight distance, on the fundus or base of the viscus, and then, 

 if the bladder is empty, it projects backwards as a semilunar 

 ledge or fold, called the sacro-genital fold (Fig. 191.) In the 

 middle portion of that fold the seminal vesicles are enclosed 

 and parts of the ductus deferentes. The lateral borders of the 

 fold curve backwards to the sacrum, passing at some little 

 distance from the sides of the rectum. From the lower 



