i 3 6 



ELEMENTS OF MAMMALIAN ANATOMY. 



branches to form the carotid plexus, a palatine, spheno pala- 

 tine, and infraorbital The latter is the direct continuation 

 of the internal maxillary. It supplies the upper teeth, lower 

 eyelid, parts of the nose, and upper lip. An ophthalmic 

 branch, supplying structures in the orbit, may arise from 

 the carotid plexus or the internal maxillary. 



FIG. 73. VENTRAL ASPECT OF THE ARTERIES OF THE HEAD AND NECK. 

 The carotids with their branches have been drawn laterad. 



a, Internal maxillary; ac, anterior cerebellar; ce, median cerebral; cr, 

 posterior cerebral ; cp, posterior cerebellar ; ex, carotid plexus, many 

 of whose branches reunite in one, ex' , which is cut off ; ex, external 

 carotid ; em, external maxillary ; inc, origin of internal carotid ; inc', 

 union of internal carotid with circle of Willis; ia, inferior alveolar; 

 if, infraorbital; i, optic chiasma; li, lingual; mm, middle meningeal; 

 ms, muscular; oc, occipital; ol, anterior cerebral; pi, palatine; pa, 

 posterior auricular; s, anterior spinal; th, thyroid; x, hypophysis; 

 i, 2, 3, 4, 5, and 6, transverse foramina in cervical vertebrae. 



