DISTRIBUTION OF ARTERIES. 117 



buccinator. It gives off slender ramifications to the invest- 

 ing cellular substance, also the buccinator arteries ; the buccal 

 twigs bifurcate, sending their divisions respectively to the 

 upper and under lips ; these form the superior and inferior 

 coronary arteries of the lips. 



The facial artery ascends upon the side of the face, crosses 

 the buccinator ; then, having run as high as the bony ridge, 

 from whence the masseter arises, it detaches a large branch, 

 and then expands upon the upper and fore part of the face ; 

 its terminating ramifications are in the cellular substance and 

 skin covering the fore part of the face. 



The posterior auricular gives branches to the parotid gland, 

 and to the different muscles of the ears. 



The temporal artery, the anterior auricular, and the inter- 

 nal maxillary, may be considered as the terminating branches 

 of the external carotid. The internal maxillary gives off deep 

 temporal branches, long slender twigs, to the soft palate, to 

 the ear, and to the articulation of the jaw ; the facial artery 

 also gives off the inferior maxillary, the supra-orbitar, the 

 ocular, the infra-orbitar, and the palate maxillary. The 

 second and smallest divisions of the carotid is the 



RAMUS ANASTOMOTICUS. 



It leaves the trunk of the carotid, joins the vertebral, and 

 from it arises the occipital artery, which gives off twigs to be 

 dispersed upon the dura mater, temporal muscle, and muscles 

 of the occiput. 



INTERNAL CAROTID. 



This vessel, whose calibre is not more than half that of 

 the external carotid, ascends to the base of the skull : at its 

 entrance into the skull, a vessel comes off named the arteria 

 communicans : after having given off this vessel, the internal 

 carotid pierces the dura mater, takes its course up near the 

 optic nerve, and branches into four divisions, which supply 

 the cerebrum with blood. 



