CH. LIX.] 



THE FCETAL CIRCULATION 



857 



CIRCULATION OF BLOOD IN THE FCETUS 



The circulation of blood in the foetus differs considerably from 

 that of the adult. It will be well, perhaps, to begin its description 

 by tracing the course of the bipod, which, after being carried to the 



FIG. 655. Diagram of the Foetal Circulation. 



placenta by the two umbilical arteries, has returned, oxygenated and 

 replenished, to the foetus by the umbilical vein. 



It is at first conveyed to the under surface of the liver, and there 



