Carotis externa. 



197 



A ethmoid al. 



anl . 

 (Carotis int.) 



._'. na-saLpost. 

 '(Carcrtis int!) 



A. incisivci 

 (A.pctlctt.ant) 



^l.septi moibil' 

 nasi 



A.coronar.labii sup. 



541. The Arteries of the Septum narium. 



(Natural size.) 



The branches arising from the third or spheno-maxillary 

 portion of the internal maxillary artery are : 



a) The superior alveolar, Art. alveolaris superior. Its branches 

 run through the foramina of the tuberosity of the superior maxillary 

 bone to the back teeth of the upper jaw and to the mucous membrane 

 of the antrum of Highmore. 



b) The infra-orbital, Art. infraorbitalis, runs along the infraorbital 

 canal, supplies the Periorbita, the MM. rectus and obliquus inferior, the 

 anterior teeth of the upper jaw, passes through the infraorbital foramen 

 to the face, and finally anastomoses with the other arteries of the face. 



c) The descending palatine, Art. palatina descendens s. pterygo- 

 palatina, sends the Vidian artery, Art. Vidiana, in the Vidian canal 

 to the upper portion of the pharynx, and divides into three branches, 

 which pass through the descending palatine canals to the soft palate 

 and the tonsils. Its largest branch, the anterior palatine, passes along 

 the hard palate to the gums of the incisor teeth and gives off the 

 Art. incisiva to the nasal cavity. 



d) The s p h eno-palatine, Art. splieno-palatina, passes through the 

 spheno-palatine foramen into the nasal cavity and supplies the posterior 

 portions of the mucous membrane and the Septum narium, and finally 

 anastomoses with the anterior palatine and the Art. septi mobilis nasi. 



26* 



