222 



UROGENITAL SYSTEM 



No epithelial cords and no tunica albuginea are developed at this stage, as in the testis. 

 Later, three important changes take place: (i) There is an ingrowth of connec- 

 tive tissue and blood-vessels from the hilus, resulting in the formation of a media- 

 stinum and of septula. (2) Most of the cells derived from the inner epithelial 



-Tututes of 

 mesonephros 

 (Parobpnoran) 



Uterine tube. 



Epithelium 

 Cortex. - 



Genital celts 

 Medulla. 



FIG. 220. Section of an ovary from a 65 mm. embryo. X 44. 



Primordial egg 



- JM* Germinal epithelium 



jf*5 



( f jittp Tunica albuginea 



* *W *.^ 



Primordial ovum 



Blood-vessel 



Pfluger's egg-tubes 



ff*wSs^aB 



^1*^5 



. j JIM. - . ' r*l Sr ff 



Primordial ova 



FIG. 221. Ovary of five-months' fetus, showing egg-tubes and primordial follicles (De Lee). 



