THE ARTERIES. 415 
lower face of the trachea for a very short distance, and then divides into 
the right and left carotids, which le on each side the trachea, gradually 
sinking deeper among the muscles of the neck till they arrive at the 
level of the larynx, when they respectively divide into three branches— 
A. carotidea externa, A. occipitalis, and A. carotidea interna. In this 
course they supply the thyroideal artery and several small muscular 
branches. The external carotid gives off (a) the submaxillary artery 
. 
5 
Frio. 5,—Beancues oF THE RiautT ARTERIA INNOMINATA. 
1. Posterior aorta. 6. 6. 6. A. dorsalis. 
2. 2. 2. 2. Intercostal branches of posterior 7. 7. A. cervicalis superior. 
aorta. 8. 8. 8. Vertebral artery. 
3. Anterior aorta. 9, 10. Inosculations of these three arteries. 
4, Right arteria innominata, endingincommon 11. Origins of the internal and external thoracic 
earotid and Bin arteries, 
5. Axillary artery. 
which has a number of branches supplying the muscles of the pharynx, 
palate, and face ; (5) the parotideal ; (c) internal pterygoid ; (d) branches 
to the masseter and auricular muscles; and finally (e) the internal 
maxillary,which penetrates deeply behind the lower jaw, and supplies those 
parts ; then going on to the eye, for which it gives off a special branch, 
the ocular, destined to the muscles of the eye and the fat in which it lies, 
