CIRCULATION.] 



PHYSIOLOGY, 



55 



is further marked off, but not completely divided, into 



ThJk 



MXX 



Fig. ^.-'Diagram of the Heart and Vessels, -with the Course of the Circu- 

 lations viewed from behind so that the proper left of the Observer corre- 

 sponds with the left side of the Heart- in the Diag^-am. 

 L.A. left auricle ; L. V. left ventricle ; Ao. aorta ; A^. arteries to the upper 



