THE HEART AND VASCULAR SYSTEM. 



183 



the anterior temporal and the posterior temporal. Its branches 

 are: 



Transverse facial, supplies the masseter muscle, parotid gland, and 

 skin; 



Middle temporal, crosses the face to supply the temporal muscle 

 and fascia; 



Anterior auricular, supplies the lobule, external meatus, and front 

 part of pinna. 



8. The INTERNAL MAXILLARY is the larger of the two termi- 

 nal branches of the external carotid. It arises in the parotid 

 gland about the level of the lower part of the lobe of the ear, 



FIG. 107. 



Internal maxillary artery: A, third portion; B, second portion; C, 

 first portion. 



passing close to the inner side of the neck of the condyle of the 

 lower jaw to be distributed to the deep structures of the face. 

 Its course is divided into three portions : the maxillary portion, 

 passing inward and forward between the internal lateral liga- 

 ment and the ramus of the jaw; the pterygoid portion, passing 

 upward and forward upon the external pterygoid muscle; and 

 the third part, or splieno-maxillary, enters the spheno-maxillary 

 fossa. Its branches are, from the maxillary portion : 



Tympanic (anterior), supplies the tympanum through the Gla- 

 serian fissure, forming a capillary plexus on the tympanic membrane; 



Middle meningeal, enters the cranium through the foramen 

 spinosum, supplies the dura mater, and gives off a petrosal branch to 

 facial nerve in hiatus Fallopii; 



