36 



PHYSIOLOGY FOR THE LABORATORY. 



B. The Parts of the Heart. 



Materials, 

 removed. 



The heart and lungs of a calf with the pericardium 



Place the mass on the table with the heart uppermost 

 and with the point of the heart extending away from you. 



Now you see the front of 

 the heart, or its ventral 

 surface. 



u s 



N 



M 



FIG. 3. Diagram of the heart and large blood- 

 vessels. A, right ventricle ; B, left ventri- 

 cle ; C, right auricle ; D, left auricle ; E, 

 inferior vena cava ; F, superior vena cava ; 



Notice : 



a. The apex, or the 

 J point of the heart. 



b. The base of the heart 

 is its large end. 



c. The ventral surface, 

 or front of the heart, is 

 the side that is now upper- 

 most as it lies on the table. 



d. The dorsal surface is 

 opposite the ventral. 

 Which is more convex ? 



e. The right side of the 



it lies on the table. 



/. The left side of the 



W and Bright and left ; innominate veins; heart is On your left. The 

 R and N, right and left subclavian veins ; J 



crand x, right and left jugular veins ; G, two sides are separated by 



pulmonary artery ; / and J, right and left 

 pulmonary veins ; H, aorta ; P, innominate 

 artery 

 arteries 



ciavian arteries. 



WV. 4-' " fV* 

 a g^OOVC. W nat IS in tmS 



y ; S and -Y. t right and left carotid PTOOVC ? 

 ies f T and M, right and left sub- 



g. The right ventricle is 



