STRUCTURE OF THE GRAAFIAN FOLLICLES. 



473 



more developed follicles. One of these situated next the cavity is com- 

 posed of condensed fine connective tissue : it contains a network of 



Fig. 336. 



Fig. 336. — Section of the Ovary of an Adult Bitch (Waldeyer). "f 



rt, germ-epitlielium ; b, ovarian tubes or strings of ovigerms ; c, c, earlier follicles ; 

 d, more advanced follicles ; e, discus j)roligerns and ovum ; /, second ovum in the 

 same follicle ; [/, alleged tunica fibrosa follicnli ; h, tunica propria ; i, follicular 

 epithelium (tunica granulosa) ; k, collapsed retrograde follicle ; I, blood-vessels ; m, m, 

 longitudinal and transverse sections of cellular tubes of the parovarium ; y, involuted 

 portion of the germ-epithelium of the surface ; z, place of the transition from periton 

 to germinal or ovarian epithelium. 



finely divided capillary blood-vessels, and has been named the vascu- 

 lar, or proper tunic of the follicle. The other, called the fibrous tunic, 

 is more strongly fibrous, and forms a condensed layer situated close to 

 the first. But, excepting in their greater degree of condensation, these 

 layers do not differ essentially from the tissue of the ovarian stroma. 



Tunica granulosa. — Within the vascuhar or proper tunic of the 

 follicle, and adherent to its inner surface, there is a distinct lining of 



