THE GENITAL GLANDS AND DUCTS LIGAMENTS 



229 



females. In the genital fold, extending from the caudal end of the ovary to the 

 genital cord, connective tissue and smooth muscle fibers developing form the 

 proper ligament of the ovary. The uterus develops in the genital cord so the liga- 

 ment of the ovary extends to the posterior surface of the uterine wall. In the 

 male the homologue of the proper ligament of the ovary is the ligament of the 

 testis. 



In both sexes the inguinal fold extends from the urogenital fold to the crista 

 inguinalis, located on the inside of the ventral abdominal wall, a point which 

 marks the future entrance of the inguinal canal. The inguinal fold thus forms a 

 bridge between the urogenital fold (in the middle portion of which the uterus 

 develops in the female) and the abdominal wall at the entrance of the inguinal 



Suprarenal 

 gland 



Muellenan duct. 

 in mesonephr'ic fold 



Genital gland. 



ftecfutrt 

 Genital cord. 



GenifaL S 



Diaphragmatic liy 

 of mesonephros 



Metanephros 

 Ureter 



Chorda, . 

 qubernacuLi, 



Glaus of phallus 



FIG. 225. Ventral dissection of a human embryo of 23 mm. showing the urogenital organs. The right 

 suprarenal gland has been removed to show the metanephros. 



canal (Fig. 225). In the inguinal crest is differentiated the conical anlage of the 

 chorda gubernaculi, which later becomes a fibrous cord. The abdominal muscles 

 develop around it and the external oblique muscle leaves a foramen, through 

 which it connects with a second cord termed in the male the lig. scroti, in the 

 female the lig. labiale (Fig. 226). The chorda gubernaculi and the lig. labiale 

 together constitute the round ligament of the uterus, 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 ligament 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 



