222 



THE UROGENITAL SYSTEM 



abdominal muscles develop around it, forming a tube, the ingtiinal canal, and the 

 external oblique muscle leaves a foramen, through which the chorda connects 

 with a second cord termed in the male the lig. scroti, in the female the lig. labiate. 

 The chorda gubernaculi and the Ug. labiale together constitute the round liga- 

 ment of the uterus (Fig. 233), as they form a continuous cord extending from the 

 urogenital fold to the base of the genital tubercle. With the development of 

 the uterus in the urogenital fold, the round hgament becomes attached to its 



ventral surface. 



Male.— The ligamentum testis, like the lig. ovarii, develops in the genital 

 fold and extends from the caudal end of the testis to the mesonephric fold at a 

 point opposite the attachment of the inguinal fold. The inguinal fold, as we have 



Diaphragmatic li, 

 ment of mesonephros 



Suprarenal gland 



MuUrrian duct 



III nil \imephric fold 



-Uciiilfil gland 



Inguinal 



Glans of pliuli 



Gniilat swelling 



Fig. 232. — Ventral dissection of a human embryo of 23 mm. showing the urogenital organs. The right 

 suprarenal gland has been removed to show the metanephros. 



seen, is continuous with the inguinal crest and the chorda gubernaculi. A cord 

 develops in the mesonephric fold and connects the ligamentum testis ■with the 

 chorda gubernaculi, for in the male the uterus does not intervene between these 

 two. The chorda gubernaculi is continued to the integument of the scrotum by 

 way of the Kgamentum scroti. Thus there is formed a continuous cord, the 

 gubernaculum testis, extending from the caudal end of the testis through the in- 

 guinal canal to the scrotal integument. The gubernaculum is composed of tl\e 

 ligamentum testis, of a mesonephric cord, of the chorda gubernaculi, and of the lig. 

 scroti, and is the homologue of the ovarian ligament plus the round ligament of 

 the uterus, between which the uterus intervenes (Fig. 233). 



The Descent of the Testis and Ovary. — The original position of the testis 

 and ovary is changed during the later stages of development. At first they are 



