THE DISTRIBUTION OF ARTERIES. 133 



rior masseter {Fig 9 . j) ; the submaxillary {Fig 9 - c ; fig 

 11 . 8) ; beside which it sends off a large and important 

 trunk, called the internal maxillary {Fig 12 . a) ; which, in 

 its turn, sends off deep temporal twigs {Fig 12 . h) ; then the 

 artery dispenses fine branches to the eye {Fig 12 ./) ; the 

 soft palate {Fig 1 2 . c) ; the ear, and the articulation between 

 the lower and upper jaw ; as well as giving rise to a large 

 trunk called the inferior maxillary {Fig 12 . d). This last 

 vessel enters the bone of the lower jaw, together with the 

 nerve, and nourishes the teeth ; and emerges through the an- 

 terior maxillary foramen, to unite with the inferior labial 

 artery {Fig 9 . d). 



Tlie terminating branches of the internal maxillary are : — 



The supra orbital {Fig 12 . e) ; which passes through the 

 foramen, upon the bony arch of the eye, and disperses upon 

 the forehead. 



The ocular {Fig \2 . f) are a bunch of arteries which, 

 springing from the base of the orbit, are expended upon the 

 appendages of the eye. 



The lateral nasal {Fig 12 . /?), which enter the brain ; and 

 having joined the anterior cerebral leave the cranium with 

 the olfactory nerves, and disperse upon the nasal membrane. 



The infra orbital {Fig 12 . g), which enter the canal of that 

 name, to nourish the bone and the upper molar teeth ; and 

 appears again upon the side of the face ; through the ex- 

 ternal infra orbital foramen, to unite with the facial artery 

 {Fig^.h). 



The palato-maxillary {Fig 12 . i) ; which is the largest 

 division of the internal maxillary, enters the palatine 

 foramen ; appears upon the bony palate, along which it runs ; 

 ultimately uniting with its fellow ; and passing through 

 the foramen incisivum, at the back of the superior incisor 

 teeth ; having emerged from which, it once more divides 

 {Fig 12 . j), being expended upon the lips. It supplies all 

 the parts along which, or near to which, it passes. 



The submaxillary artery {Fig 9 . c ; fig \2 . 3, 3) proceeds 

 forward ; passes over the inferior border of the lower jaw ; 

 where it is merely covered by the skin and panniculus, as it 

 runs along to the anterior margin of the external masseter 

 muscle ; and close to the molar teeth becomes the facial {Fig 

 9 . h) ; and also sends off the inferior labial {Fig 9 . d). 



