450 TOPOGRAPHICAL ANATOMY. 



Pelvis. 



700. I. Pubic region, regie pubis (see parts of generation). 



Cavity of the small pelvis. Behind the symphysis pubis : 

 1. Urinary bladder. 2. Vas deferens and ureter upon both 

 sides (they cross each other). 3. Fossa recto-vesicalis in the male, 

 vesico-uterina in the female. 4. In the female : Uterus, vagina, 

 and broad ligaments (they divide the pelvis into an anterior and a 

 posterior half) ; behind that fossa recto-uterina. 5. Behind and 

 to the left, rectum, fixed above by meso-rectum, below by loose 

 areolar tissue. 



701. II. Perinoeal region, R. perincei, 



closes the pelvic outlet, is bounded behind by the coccyx, on the side 

 by ligg. sacro-ischiatica, tuber and ram. ascendens ischii, in part, 

 by ligg. pubicum inferius ; below, by the external skin, above, by 

 the peritoneum. It is oval, passes forwards towards the root of 

 the penis (or the commissura poster, labior.pudend.), and is divided 

 by a transverse line extending between the two tuberosities of the 

 ischia, into the anterior, proper perinseal, and into the anal region. 



1. Reg. analis, region of the anus. 



a. At the sides of the anus: 1. The skin. 2. Much areola, 

 containing adipose tissue with vasa and nn. hcemorrhoidal. inferr. 

 3. Fasc. perincei. 4. M. kvator and sphincter ani. 5. Fascia 

 pelvis. 6. Peritoneum. 



b. Behind the anus : skin, condensed areolar tissue, containing 

 adipose, posterior extremity of sphincter ani, fascia perm., mm. 

 levatores in the raphe, fascia perin. superior, fat and areolar tissue, 

 coccyx, and sacrum. 



2. Reg. perincealis s.uro-genitalis,tl\Q anterior triangular part of 

 the perineum, between the pubic arch and a transverse line between 

 the two tubera ischii. 



a. In the male: 1. Skin, wrinkled, thin, hairy. 2. Loose lami- 

 nated areolar tissue with adipose, which continues on to the scrotum. 

 3. Fascia superficialis with the vasa and nn. perincei super jw. (in 

 the direction of tuber ischii of the one to the spina pubis of the 

 other side.) M. bulbo-cavernos. in the centre, transvers. and ischio- 

 cavernosi on the sides. 5. Btdbus uretfirce in the centre, corp. ca- 

 vernos. on the sides ; in the triangular space between the two, two 

 or three lines from the ram. ascend, ischii, crosses art. transvers. 

 perincei ; 4. and 5. lie in a sheath formed of fasc. superfic. and 

 profunda s. media. 6. Lig. perinceale ; it is perforated by bulb, 

 urethra and vasa, nn. dorsal, penis (between corp. cavernos. and 



