DEEP DISSECTION" OF THE PERINEUM. 



1041 



be made to enter the bladder over the projection referred to. The part of 

 the urethra encircled by the prostate admits of considerable dilatation. For 

 the position of the seminal and other openings into it, reference may be 

 made to the description of the canal at page 961. 



Behind the prostate the neck of the urinary bladder presents itself. Here 

 the bladder is bound to the pubes at its upper part by the pelvic fascia, the 

 bauds of which are named its anterior ligaments. Laterally the fascia 



Fig. 715. THE BONES OF THE SUBPUBIC ARCH 

 WITH THE ANTERIOR PART OP THE DEEP 

 PERINEAL FASCIA. 



In consequence of the connection between the 

 fascia aud the fibrous covering of the bulb having 

 been cut, the passage for the urethra appears as a 

 hole. 1, pubes near the symphysis ; 2, hip-bone 

 close to its tuberosity ; 3, deep perineal fascia 

 its anterior surface. 



reaches the organ in question over the side 

 of the prostate ; and an elongation from 

 the same membrane extends from side to 

 side between the bladder and the rectum, 

 after investing the vesiculse seininales and 

 vasa deferentia. 



Turning attention in the next place to the rectum, which occupies the 

 irregularly shaped space behind the perinoeum, we shall recall a few parti- 

 culars respecting it. The lowest or third division of the bowel, which 

 measures about an inch and a half in length, is directed obliquely back- 



Fij?. 718. THE PELVIC 

 VISCERA OP THE MALE 



SEEN ON THE LEFT 

 SIDE. 



1, the body of the pubes 

 sawn through ; 2, cor- 

 pus cavernosum penis ; 2', 

 corpus spongiosum ; 3, 

 prostate gland with a 

 portion of the levator ani 

 covering its fore part ; 4, 

 urinary bladder; 5, in- 

 testinum recbum ; 6, deep 

 perineal fascia its two 

 layers ; 7, cut edge of the 

 pelvic fascia extending 

 from the pubes to the 

 back part of the prostate ; 

 8, vas deferens ; 8', vesi- 

 cula seminaiis ; 9, ureter. 

 The jagged cut edge of the 

 peritoneum is seen passing 

 over the bladder and rec- 

 tum. 



Fig. 716. 



wards from the fore part of the prostate to the amis ; and, as at the same 

 time the urethra here inclines forwards with the penis, the space between 

 the two widens towards the surface of the perinseum. Into this space the 

 bulb of the corpus spongiosum drops down, occupying it more or less 



3 Y 



