214 



THE SEASON WHY. 



"Thy hands have made me and fashioned me: give me understanding, that I 

 may learn thy commandments." PSALM cxix. 



the lungs, therefore, are the great purifiers of the venous blood. 

 But there are also smaller organs that assist in the same work. 



Fig. 53. SHOWING THE DISTRIBUTION OP BLOOD THEOUGH BRANCHES OP 

 THE AOETA. 



A. The aorta. 



B. Branches given off for the aorta to supply one portion of the intestines. 



C. Branches given off by the aorta to supply other portions of the intestines. 

 A complete communication maybe traced between these vessels from the origin 

 of one to that of the other. 



D. The pancreas, or sweetbread, a large gland that forms the pancreatic jnice, 

 which it pours in through the duct. See Fig. 50. 



E E B. The large intestines, forming the termination of the alimentary canal 



CHAPTER XLIV. 



902. Why when we cut our flesh does it heal f 



