840 



GENERATION. 



from the lungs, by the pulmonary veins. Thus the left ventricle is filled. 

 At the same time the right ventricle is filled with blood which has passed 



Pulmonary Art. 



Foramen Ovale 



Eustachian Valve 



Right Auric.-} ent. Opening A>! 



Bladder. 



Pulmonary Art. 

 Left Auricle. 



Left Auric. Vent. 



Opening. 



Hepatic Vein. 



Branches of the 

 Umbilical Vein, 

 to the Liver. 



Ductus Venosus. 



Internal Iliac Arteries. 

 FIG. 315 Diagram of the foetal circulation. 



through the right auricle, in front of the Eustachian valve. The two ventri- 

 cles, thus distended, then contract simultaneously. The blood from the 



