1408 



THE URINOGENITAL ORGANS 



elliptical figure being transversely placed. On its surface is a small aperture, 

 the external os or os uteri (orificium externum uteri) (Figs. 1161 and 1164), gener- 

 ally linear in shape, but sometimes oval 

 or almost circular. If a woman has 

 borne children, the opening is trans- 

 verse and the margins are irregular. 

 The margin of the opening is, in the 

 absence of parturition or disease, 

 quite smooth. This aperture divides 

 the vaginal portion of the cervix into 

 two lips, an upper or posterior lip 

 (labium posterius) and an anterior lip 

 (labium anterius). On each side of 

 the cervix and upper portion of the 

 vagina there is a space containing 

 bloodvessels and filled with loose 

 cellular tissue. This loose tissue 

 passes upward between the layers of 



the broad ligament, and is called parametrium. On each side of the cervix and 

 three-quarters of an inch away is the terminal portion of the corresponding ureter. 



RECTAL PERITONEUM 

 ECTOVAGINAL POUCH 



ANTERIOR AND POS- 

 TERIOR LAYERS OF 

 BROAD LIGAMENT 



VESICAL 

 PERITONEUM 



UTEROVESICAL 

 POUCH 



SUPRAVAGINAL 

 PORTION OF 

 CERVIX 



FIG. 1165. The cervix uteri and upper end of the 

 vagina, showing their relations to the peritoneum. Dia- 

 grammatic. (Testut.) 



ROUND 



LIGAMENT. 



External iliac 



artery. 

 Ureter. 



Apex of Douglas's 

 pouch. 



External iliac 

 artery. 



166,-Douglas' pouch. (From a preparation in the Museum of the Royal College of Surgeons of England. 



Folds and Ligaments. -The ligaments of the uterus are eight in number. 



borne are simple folds of peritoneum; others contain connective tissue and muscle. 



ligaments are as follows: one anterior, one posterior, two lateral or broad, 



