ii82 A MANUAL OF ANATOMY 



The external palpebral arteries, superior and inferior, are branches 

 of the lachrymal artery within the orbit. Their course is inwards 

 between the palpebral fibres of the orbicularis palpebrarum and 

 the tarsal plates, and they anastomose, and form arches, with the 

 palpebral branches of the ophthalmic. 



The external palpebral veins terminate in the orbital vein, which 

 opens into the middle temporal vein, this in turn joining the super- 

 ficial temporal vein. 



The temporal and malar arteries are branches of the lachrymal, 

 and they accompany the temporal and malar branches of the 

 temporo-malar or orbital nerve. 



The orbital and anterior temporal arteries have been already 

 described (see Index). 



The infra-orbital artery arises from the third part of the internal 

 maxillary in the spheno-maxillary fossa. Having passed horizon- 

 tally forwards, with the infra-orbital nerve, through the infra- 

 orbital canal it emerges with that nerve through the infra-orbital 

 foramen, lying under cover of the levator labii superioris muscle. 

 It then gives branches upwards to the lower eyelid, inwards to the 

 side of the nose, and downwards towards the upper lip. It anasto- 

 moses with the inferior palpebral, facial, transverse facial, and 

 buccal arteries. 



The infra-orbital vein, having traversed the infra-orbital canal, 

 opens into the pterygoid plexus. 



The buccal artery is a branch of the second part of the internal 

 maxillary. It accompanies the long buccal nerve to the super- 

 ficial surface of the buccinator muscle, and is distributed to that 

 muscle and to the mucous membrane of the cheek. It anastomoses 

 with branches of the facial artery. 



The mental artery is one of the terminal branches of the inferior 

 dental from the first part of the internal maxillary, and it emerges 

 from the dental canal of the inferior maxilla, along with the mental 

 nerve, through the mental foramen, lying under cover of the de- 

 pressor anguli oris muscle. It supplies the structures in this 

 vicinity, and anastomoses with the inferior coronary, inferior labial, 

 and submental arteries. 



The mental vein joins the inferior dental vein, which opens into 

 the pterygoid plexus. 



Lymphatics. — ^The lymphatics of the face are arranged in 

 two sets, superficial and deep. The superficial lymphatics for the 

 most part take a course similar to that of the facial vein, and 

 terminate in the submaxillary lymphatic glands. They receive 

 the lymphatics of (i) the inner portion of the frontal region 

 at the inner canthus ; (2) the inner portions of the eyelids ; (3) the 

 side of the nose ; (4) the portion of the face between the lower 

 eyelid and upper lip ; and (5) the upper and lower lips. The 

 lymphatics from the temporal and outer part of the frontal regions, 

 from the front of the auricle, from the outer portions of the eye- 



