THE UTERUS. 717 



The uterus (u, c, fig. 199) is a somewhat pyriform, fibrous 



organ, with a central cavity lined with mucous membrane. 



In the unimpregnated state it is about three inches in 



length, two in breadth at its upper part, or fundus, but at its 



Fig. 200. 



,5 



lower pointed part or neck, only about half an inch. The 

 part between the fundus and neck is termed the body of 

 the uterus : it is about an inch in thickness. The walls 

 of the oran are composed of dense fibro-cellular tissue, 

 with which are intermingled fibres of organic muscle : in 

 the impregnated state the latter are much developed and 

 increased in number. The cavity of the uterus corresponds 



* Fig. 200. Yiew of a section of the prepared ovary of the cat (from 

 Schrbn) f. I. outer covering and free border of the ovary ; I', attached 

 "border ; 2, the ovarian stroma, presenting a fibrous and vascular structure ; 

 3, granular substance lying external to the fibrous stroma; 4, blood- 

 vessels; 5, ovigenns in their earliest stages occupying a part of the 

 granular layer near the surface; 6, ovigerms which have begun to 

 enlarge and to pass more deeply into the ovary ; 7, ovigerms round 

 which the Graafian follicle and tunica granulosa are now formed, and 

 which have passed somewhat deeper into the ovary and are surrounded 

 by the fibrous stroma; 8, more advanced Graafian follicle with the 

 ovum imbedded in the layer of cells constituting the proligerous disc; 

 9, the most advanced follicle containing the ovum, etc.; ! 9', a follicle 

 from which the ovum has accidentally escaped ; 10, corpus luteum. 



