282 ANATOMY AND PHYSIOLOGY FOR NURSES 



These vesicles have thin, transparent walls, and are filled 

 with a clear, colorless, albuminous fluid. The Graafian 

 vesicles are, during their early development, small, and 



FIG. 152. Section through part of ovary of adult bitch: a, Germinal 

 epithelium; b, b, ingrowths (egg-tubes) from the germinal epithelium, seen 

 in cross-section ; c, c, young Graafian follicles in the cortical layer ; d, a 

 more mature follicle, containing two ova (this is rare) ; e and /, ova sur- 

 rounded by cells of discus proligerus ; g, h, outer and inner capsules of the 

 follicle ; z', membrana granulosa ; /, blood-vessels ; m, m, parovarium ; g, 

 germinal epithelium commencing to grow in and form an egg-tube ; z, tran- 

 sition from peritoneal to germinal epithelium (from Waldeyer). 



deeply seated in the substance of the ovary; as they 

 enlarge they approach the surface, and when mature 

 they form small projections on the exterior of the ovary 



