HEART 



401 



A 3 



PRCSSUBC IN 



Artery. 



Auricle. 

 Great Veins 



Ventncle 



rLOW of BLOOD 



from 



1 Great Veins to Auricjes 



8. Auricles to Ventricles. 



3i Ver»tricles to Arteries 



CLOSURE of 



1 Auriculo-Ventncular Valve 



2 Semihanar VaWes 



SOUNDS of HEART 



CARDIAC IMPULSE 



ELECTRO CARDIOGRAM 



Fig. 173. — Diagram to show the Relationship of the Events in the Cardiac 

 Cycle to one another. A.S., auricular systole; V.S., ventricular 

 systole ; P. , pause. 

 26 



