454 



OPERATIONS ON THE KESPIEATORY APPARATUS. 



Fig. 397.— Parotid Kegion— Superficial Layer. 

 PP, parotid gland; Mpa, parotido-auricular muscle; 3, transveral artery of the face; 

 4, maxillo-muscular vein; 7, jugular vein; 8, glosso-facial vein; 9. transversal vein of 

 the face; 10, maxillo-muscular vein; 12, posterior auricular vein; 13, facial nerve; 

 15, auricular branch of the 2d cervical pair. 



The arteries are tlie three divisions of the primitive carotid ; 

 1st, the occipital, which, by its mastoid branch, runs over the ex- 

 ternal surface of the styloid process of the occipital bone ; 2d, the 

 internal carotid, which runs upward through the thickness of the 

 fold of the mucous membrane which forms the guttural sacs ; 3d, 

 the external carotid, with its parotid branches, the maxillo-mus- 

 cuiar, the posterior auricular, the superficial temporal trunk and 

 the internal maxillary The veins, which are numerous, empty 



