768 



GENERATION AND DEVELOPMENT. 



or by the roundabout way through, the liver, all the 

 blood which is returned from the placenta by the umbili- 

 cal vein reaches the inferior vena cava at last, and is 



Fig. 234. 



carried by it to the right auricle of the heart, into which 

 cavity is also pouring the blood that has circulated in the 

 head and neck and arms, and has been brought to the 



