230 



UROGENITAL SYSTEM 



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

 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 ligamentum 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 the 

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



ros 



Supra, renal 

 gland 



Diaphragmatic 

 ligament 



Ureter 

 Ovary 



L'ic. ovarii 



Bound lia. of 

 Uterus 



Phali 



FIG. 226. Ventral dissection of a female human embryo of 34 mm. The urogenital organs are dissected 

 out and the left suprarenal gland has been removed. 



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

 the uterus. 



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 

 elongate structures, extending in the abdominal cavity from the diaphragm cau- 

 dally towards the pelvis (Fig. 213). As development proceeds, their caudal ends 

 enlarge and their cranial portions atrophy so that there is a progressive movement 

 of the glands caudad. When the process of growth and degeneration is completed 

 the caudal ends of the testis lie at the boundary line between the abdomen and 



n/le'fa.neph 



Pehis of 

 metanephros 



Uterine tube 

 Rectum 



Dtero-vaqinal 



GLnlCLqe J 



Bladder 



Genital swe//ina 

 Glans c/!t( 



