430 BLOOD-VESSELS OF THE HEAD. 



The liyoid is the first branch and supplies the parts above 

 the os-hyoides. 



The dorsalis linguce, the second branch, ascends to the 

 dorsum of the tongue supplying the base of this organ, the 

 fauces and the velum. 



The sublingual is the third branch, and sends branches 

 to the sublingual gland, the inylo-hyoid muscle, and the 

 mucous membrane ; this sometimes comes from the facial. 



The canine forms the continued trunk of the lingual, and 

 advances forward between the genio hyo-glossus and lin- 

 gualisj to the tip of the tongue, sending oif branches on 

 either side as it proceeds forward. 



The facial artery arises a few lines above the lingual, 

 opposite the os-hyoides, ascends behind the digastric mus- 

 cle to the base of the lower-jaw, a little anterior to its angle, 

 above and closely connected with the sub-maxillary gland. 

 It mounts over the lower jaw anterior to the masseter mus- 

 cle, then ascends to the angle of the mouth, and still upward 

 to the angle of the eye, where it terminates by anastomosing 

 with the ophthalmic branch of the internal carotid. 



Its branches are : 



The inferior palatine which ascends by the side of the 

 pharynx, between the stylo-glossus and stylo-pharyngeus 

 muscles, to supply the tonsils and velum, and anastomoses 

 with the superior palatine from the internal maxillary. 



The submaxillary sends off several branches to the sub- 

 maxillary and adjacent lymphatic glands. 



The sub-mental comes oif at the base of the lower jaw and 

 proceeds forward upon the mylo-hyoid muscle, above the 

 anterior belly of the digastric to the chin, supplying these 

 muscles and anastomosing with its fellow of the opposite 

 side, and with the inferior dental and inferior labial arte- 

 ries. 



The next branch is the inferior labial, given off after the 

 facial has made its curve upon the face. This supplies the 

 muscles and integuments of the lower lip. 



At the angle of the mouth is the inferior coronary. This 

 sometimes supplies the place of the inferior labial. 



