Veins to head and arms 



Arteries to head and arms 

 Aorta 



Circulation of liver 



Portal vein 



Circulation of 

 digestive system 



Veins of legs 



Arteries of legs 



THE CIRCULATION OF THE BLOOD 



Blood from the capillaries of the stomach and the small intestines is carried by the 

 portal vein and through the capillaries of the liver before it goes back to the heart. 

 That is, the blood here goes through two sets of capillaries on the way from the left 

 heart to the right heart 



passes it into the ventricle, or pumping chamber. The right ventricle pumps 

 blood into the large pulmo7iary artery, which carries it to the capillaries of 

 the lungs. As with the corresponding chambers on the left side, a valve pre- 

 vents the backflow of blood when the right ventricle contracts or expands. 



191 



