DESCENT OF THE TESTICLES 



197 



Wolffian mesente y, which is continued upwards as a fold to the diaphragm. The 

 genital gland is fixed to its inner aspect by the genital mesentery, and the two 

 ducts to its outer side by the urogenital fold (fig. 234). The latter merges 

 with the Wolffian mesentery behind the Wolffian body to form the urogenital 

 mesentery, and this in turn unites with its fellow to form the genital cord 

 (fig. 247). The genital mesentery is continued upwards as the upper, and 

 downwards as the lower genital fold. The latter joins, at the lower end of the 



\ 



bladder 



body rectum 



symphysis 



cervix 



L. maj. L. min. Hymen 



FIG. 249. VERTICAL LONGITUDINAL SECTION OF THE PELVIS : A, OF A FCETUS OF 6 CM. ; 



B, OF A FCETUS OF 10 CM. ; C, OF A FCETUS OF THE SEVENTH MONTH. (From -Nagel.) 



In A and B : 1, Junction of vagina and uterus ; 2, sinus urogenitalis ; 3, bladder. 



Wolffian body, the urogenital fold, while from the same point a fold passes to 

 the groin, the plica gubernatrix. In the female the adult conditions are easily 

 deduced from this description. When the Wolffian body disappears, the Wolffian 

 merges in the urogenital fold to form the mesosalpinx, and the mesovarium 

 becomes an adjunct to it. The remainder of the urogenital mesentery is the 

 primitive broad ligament; and when the Fallopian tubes and ovaries sink into 

 the pelvis, all merge in one wing-like fold of peritoneum. The upper genital 



