148 



BIOLOGY OF THE LABORATORY MOUSE 



uterine musculature. Where the horns unite externally the mesometria 

 join and end on the dorsal wall of the corpus. 



The Ovary. — The ovaries are paired glands in which the female sex 

 cells, the ova, develop. The free surface of the ovary is envolved in a thin 

 transparent membrane, the ovarian capsule, which encloses the periovarian 



per. sp. 



col. tub. 



lig.o. 



BUS 



m. of cap. 



inf. of m. inf. ist. lig. o. pr. 



Fig. 76. — Reconstruction of the ovary, oviduct and part of the uterine horn. 

 {After Drawn.) o. v., ovarian vein; o. art., ovarian artery; per. sp., periovarian space; 

 cap., capsule; amp., ampulla; u. v., uterine vein; u. art., uterine artery; col. tub., 

 colliculus tubarius; u. h., uterine horn; lig. o. pr., ligamentum ovarii proprium; ist., 

 isthmus; inf., infundibulum; inf. of m., infundibulum-ovarial fold of muscular meso- 

 tubarium; m. of cap., musculature of ovarian capsule; h., hilus of ovary; Hg. o. sus., 

 ligamentum ovarii suspensory. 



space. The ovarian capsule consists of a thin membrane of connective 

 tissue covered on both surfaces by mesothelium. Small, blindly ending 

 vestigial tubules of the Wolffian body, the epoophoron, may be present in or 

 near the mesovarium. These are lined by cuboidal, often ciliated, epithe- 

 lium and are surrounded by a thin circular smooth muscle wall. 



A cross section of the ovary of an adult mouse (Fig. 76) shows an inner 

 zone, the medulla (or zona vasculosa), and a surrounding outer zone, the 

 cortex. Blood vessels enter and leave the organ at the hilus. They con- 



