994 GENERATIVE APPARATUS. 



across horizontally, the vagina is in relation with the rectum above, below with 

 the bladder, and laterally with the sides of the pelvis and the ureters. Con- 

 nective and adipose tissues suiTOund it posteriorly. 



Internal conformation.— The inner surface of the vagina is always lubricated 

 by an abundance of mucus, and is ridged by longitudinal folds {columnce rugosce). 



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In front, at the bottom of the canal, is observed the projection formed by the 

 cervix uteri ; posteriorly, this surface is continuous with that of the vulva. 



Structure. — The vagina is formed of two tunics — an inner, mucous, and 

 nn external, muscular. The mucous membrane (pale red in colour) is continuous 

 with that Uning the vulva and the uterus (and bladder) ; it is provided with 



