DISEASES OF THE HEART, BLOOD VESSELS, AND LYMPHATICS. 



DESCRIPTION OF PLATE. 



Plate VII: 



Diagrpji illustrating the circulation of the blood. The arrows indicate 

 the direction in which the blood flows. The valves of the heart, situ- 

 ated between the right auricle and ventricle, and left auricle and 

 ventricle, and between the ventricles and large arteries, are represented 

 by curveil lines. These valves are intended to prevent the flow of 

 blood in a direction contrary to that indicated by the arrows. 



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