THE UROGENITAL SYSTEM 



Aorta 



Lung 



Diaphragm 



Ostium abdominale 



Miillerian duct 



Inferior vena cava 



Genital gland 

 Colon 



Attantois 



Pulmonary trunk 

 Pulmonary artery 



Esophagus 

 Mesonephric duct 



Umbilical artery 



FIG. 223. Ventral dissection of an 18 mm. pig embryo, to show the anlages of the Mullerian 



ducts. X 7. 



Trachea 



Esophagus 



Genital gland 



Mesonephric duct 



Attantois 



Lung 



_ Mesonephros 

 M idler ian duct 



-Colon 

 Umbilical artery 



FIG. 224. Ventral dissection of a 24 mm. pig embryo, showing the anlages of the Mullerian 

 ducts at a later stage of development than in Fig. 223. X 6. 



