2IO 



THE UROGENITAL SYSTEM 



Mcsencephalon 



Prosencephalon 



Rhombencephalon 



Right lung 



Mesonephric fold 



Lower extremity 



Genital eminence 



Tail 



FIG. 220. Ventral view of the urogenital folds in a human embryo of 9 mm. (Kollmannl. 



Lateral body watt 



Post, cardinal vein 



Suprarenal gland' 



Glomerulus 



Mesonephric duct 



Inner epithelial mass of genital gland 

 Epithelium of genital gland 



Mesentery- 



FfG- 221. Transverse section through the mesonephros, genital gland and suprarenal gland 

 of the right side; from a 12 mm. human embryo. X 165. 



