HEAD AND NECK 



dome, separating it from the subclavian vein, which ends at 

 the medial border of the muscle. Immediately above the 

 vein the subclavian artery crosses the dome below its apex. 

 The internal mammary artery descends from the subclavian, 

 passes posterior to the subclavian vein, and is crossed, as it 

 lies behind the vein, by the phrenic nerve, which passes in 

 some cases anterior to, and in others posterior to the artery. 



Parotid duct 

 / Accessory parotid gland 



Internal pterygoid 



Mandible 



>maxillary 

 Mucous membr 



Sublingual gland 

 Tongi 

 Mylo-hyoid 

 Anterior belly of digastric 



Lingual nerve 

 Mandible 



Mylo-hyoid 

 Surface of submaxil- 

 lary gland covered 

 by mandible 

 Surface covered by 

 integument and fasciae 



FIG. 105. Dissection of the Parotid, Submaxillary, and Sublingual Glands. 



The costo-cervical artery ascends from the subclavian and 

 crosses the apex of the dome ; its superior intercostal branch 

 descends, posterior to the apex, between the first intercostal 

 nerve on the lateral side, and the first thoracic sympathetic 

 ganglion on the medial side. The vagus nerve descends 

 anterior to the medial part of the subclavian artery, and, on 

 the right side, its recurrent branch turns round the lower 

 border of the artery ; the ansa subclavia lies to the lateral 

 side of the recurrent nerve. 



