118 



Al^ATOMY FOR NUESES. 



[Chap. X. 



The common carotid arteries. — As the left common carotid 

 arises from tlie middle of the upper surface of the arch of the 

 aorta, while the right common carotid arises at the division of 

 the innominate, the left carotid is an inch or two longer than 

 the right. They ascend obliquely on either side of the neck 



Fig. 90. — The Carotid, Subclavian, and Axillary Arteries. 1, commcn 

 carotid artery ; 2, internal carotid ; 3 and 18, external carotid ; 8, facial artery ; 22, 

 subclavian artery ; 28, axillary artery ; 33, commencement of brachial artery. 



until, on a level with the upper border of the thyroid cartilage, 

 "Adam's apple," they each divide into tw^o great branches, of 

 which one, the external carotid, is distributed to the superficial 

 parts of the head and face, and the other, the internal carotid, to 

 the brain and eye. At the root of the neck the common carotids 



