CIRCULATION OF THE BLOOD. 



97 



various organs in that region. At the lower part of the 

 abdomen, the aorta divides (Fig. XI.) into two branches, 

 (Fig. XL e, e,) which pass through the groins and all the 

 limbs below. 



FIG. IX. .Aorta and Branches in the Chest. 



a, b, Heart. 



c, Ascending aorta. 



d, Arch of the aorta. 



e, Descending aorta. 



/, /, Carotid arteries 

 going to the head. 



ff, g, Subclavian arte- 

 ries going to the arms. 



A, h, Branches going 

 to the chest. 



i, i, Branches to the 

 right and left lung. 



k, Great artery going 

 to the lungs. 



212. The subclavian arteries (Fig. IX. g-, g) pass from the 

 arch of the aorta, and, extending under the collar bones and 

 through the arm-pits, they reach the arm ; at the elbows they 

 divide into two main branches. One of these can be felt at 

 the wrist, near the root of the thumb. These arteries send 

 numberless little branches, which reach all the flesh of the 

 arms and hands. 



213. The carotid arteries passing up by the sides of the 

 neck, can be felt near the windpipe. At the top of the neck 

 they divide into two branches, one of which passes through 

 the skull, and is distributed to the brain. The arteries 



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