FffiTAL CIRCULATION. 

 FSf. 182.* 



617 



U U 



* The fatal circulation. 1. The umbilical cord, consisting of the umbilical 

 vein and two umbilical arteries; proceeding from the placenta (2). 3. The 

 umbilical vein dividing into three branches ; two (4, 4) to be distributed to the 

 liver ; and one (5), the ductus venosus, which enters the inferior vena cava (6). 

 7- The portal vein, returning the blood from the intestines, and uniting with 

 the right hepatic branch. 8. The right auricle ; the course of the blood is 

 denoted by the arrow, proceeding from 8, to 9, the left auricle. 10. The left 

 ventricle ; the blood following the arrow to the arch of the aorta (11), to be 

 distributed through the branches given off by the arch to the head and upper 

 extremities. The arrows 12 and 13, represent the return of the blood from 



