LEPUS. 



172. Heart. Eemove the heart from the body by cutting through the bases of the 

 great veins and arteries, examine in water, and make drawings of the dorsal and ventral 

 aspects, showing : right and left auricles, right and left ventricles ; aorta ; superior and 

 inferior venae cavae ; pulmonary artery and vein. 



173. Heart. Examine the demonstration specimen of a human heart cut open to 

 show the interior. Note relative thickness of ventricular walls ; spongy interior of 

 ventricles ; mitral valve, guarding opening between left auricle and ventricle ; tricuspid 

 valve, between right auricle and ventricle ; chordae tendinse ; papillary muscles ; semi- 

 lunar valves at commencement of aorta and pulmonary artery ; fossa ovalis ; coronary 

 arteries and veins. 



