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EXPERIMENTAL PHYSIOLOGY 



B, Carefully cut away the pericardium from the blood 

 vessels, and the fat from the surface of the heart. Locate 



irc 



Fig. 35. — Heart in position with pericardium removed (Human): Tr, trachea; 

 L, lungs; RA, LA, right and left auricles; RV, LV, right and left ventricles; Ao, 

 aorta (two branches); SVC, IVC, superior and inferior venae cavse; PA, pulmonary' 

 artery. 



the aorta, vence cavce, pulmonary veins and artery; and push 



bristle seekers through these blood vessels into the heart. 



C Examine the outside of the heart and locate the follow- 



