Circulation of the Blood. 



caval veins, it does not go as fast as when it left the heart 

 in the aorta, for there are two caval veins each about as 

 large as the aorta. 



Pulmonary Vein 



Left Auricle 



Left Ventricle 



Aorta 



Digestive Tube 



Pulmonary Artery 



Lymph Vein 



Right Auricle 



Right Ventricle 

 Caval Vein 



r-y&f-tt Liver 



Fig. 42. Plan of Circulation. (Back View.) 



Rate of Flow in Arteries, Capillaries, and Veins. The 



blood flows rapidly in the arteries, slower in the veins, and 

 slowest in the capillaries. 



Effects of Alcohol on the Circulation. The continued 

 use of alcoholic liquors frequently causes what is known 

 as "fatty degeneration" of the heart. The muscle cells 

 are more or less replaced by fatty tissue, thus greatly 



