

94 



PHYSIOLOGY AND HEALTH. 



and behind the breast-bone. The smaller end or apex is 

 downward, and turned toward the left. When the heart 

 contracts, to send the blood out, the apex is thrown forward 

 and strikes against the ribs of the left side, near the breast- 

 bone, wnere the beating is very easily felt 



FIG, VII. Heart. 



f, Artery carrying the blood 

 from the right ventricle to the 

 lungs. 



g, k, Great veins carrying the 

 blood from the body to the 

 heart. 



ct, Right auricle. 



b, Left auricle. 



c, Right ventricle. 



d, Left ventricle. 



e, Great artery carrying the 

 blood from the left ventricle to 

 the body. 



206. The internal cavity of the heart is divided by a par- 

 tition wall of flesh (Fig. VIII. c) into two apartments, 

 one on the right, and one on the left. This separation of 

 the two sides of the heart is complete. There is no passage 

 way through this wall, and consequently no direct communi- 

 cation between the two apartments. They are sometimes 

 described as two hearts united together. 



