554 



ANGIOLOGY 



f 



situation, to accommodate itself to the movements of the pharynx in deglutition; 

 and in the latter, to the movements of the mandible, lips, and cheeks. 



Relations. In the neck, its origin is superficial, being covered by the integument, Platysma, 

 and fascia; it then passes beneath the Digastricus and Stylohyoideus muscles and part of the 

 submaxillary gland, and frequently beneath the hypoglossal nerve. It lies upon the Constrictores 

 pharyngis medius and superior, the latter of which separates it, at the summit of its arch, from 

 the lower and back part of the tonsil. On the face, where it passes over the body of the mandible, 

 it is comparatively superficial, lying immediately beneath the Platysma. In its course over the 

 face, it is covered by the integument, the fat of the cheek, and, near the angle of the mouth, 

 by the Platysma, Risorius, and Zygomaticus. It rests on the Buccinator and Caninus, and 

 passes either over or under the infraorbital head of the Quadratus labii superioris. The anterior 

 facial vein lies lateral to the artery, and takes a more direct course across the face, where it is 

 separated from the artery by a considerable interval. In the neck it lies superficial to the artery. 

 The branches of the facial nerve cross the artery from behind forward. 



Septal 

 Superior labial 



Inferior labial 



FIG. 508. The arteries of the face and scalp. 1 



Branches. The branches of the artery may be divided into two sets: those 

 given off in the neck (cervical), and those on the face (facial). 



Cervical Branches. Facial Branches. 



Ascending Palatine. Inferior Labial. 



Tonsillar. Superior Labial. 



Glandular. Lateral Nasal. 



Submental. Angular. 



Muscular. Muscular. 



1 The muscular tissue of the lips must be supposed to have been cut away, in order to show the course of the labial 

 arteries. 



