422 



TEXT-BOOK OF EMBRYOLOGY. 



occupy in the adult. This migration is brought about, to some extent at 

 least, by the influence of certain bands of tissue which are primarily like 

 mesenteries. As the mesonephros develops and projects into the body cavity, 



Ureter 



Epididymis \ 



Testicle 



Deferent duct 



Inguinal ligament / 



(Gubernaculum testis) "" - /- 



Processus vaginalis 

 peritonaei 



Umbilical cord 



FIG. 375. From a dissection of the pelvic region of a male human foetus of 21 cm. 

 Kollmanri's Atlas. 



it comes to be attached along the dorsal body wall, lateral to the dorsal mesen- 

 tery, by a sheet of tissue which is called the mesonephric mesentery. Cranial to 

 the mesonephros, this mesentery is continued as the diaphragmatic ligament 



Peritoneum - - 

 Mesorchium 



Tunica vaginalis J- - 



Testicle and 

 epididymis i* 



Inguinal cone 



\ 

 Scrotum 



Spermatic cord 

 ' Inguinal ring 



Tunica vaginalis 

 communis 



Rap he 



FIG. 376. From a dissection of the scrotal region of a human foetus of 25 cm. 

 Kollmanri's Atlas. 



of the mesonephros, which as the name indicates, is attached to the diaphragm; 

 caudally it is continued to the inguinal region as the inguinal ligament of the 



