OF THE HEAD, FACE, AND NECK. 



563 



in the deep cervical glands. They have not at present been demonstrated in 

 the dura mater, or in the substance of the brain. 



The Lymphatic Glands of the Neck are divided into two sets, superficial and deep. 



The superficial cervical glands are placed in the course of the external jugular 

 vein, between the Platysma and Sterno-mastoid. They are most numerous at 

 the root of the neck, in the triangular interval between the clavicle, the Sterno- 

 mastoid, and the Trapezius, where they are continuous with the axillary glands. 

 A few small glands are also found on the front and sides of the larynx. 



The deep cervical glands (Fig. 316) are numerous and of large size; they form 

 an uninterrupted chain along the sheath of the carotid artery and internal jugu- 



Fig. 316. The Deep Lymphatics and Glands of the Neck and Thorax. 



lar vein, lying by the side of the pharynx, oesophagus, and trachea, and extend- 

 ing from the base of the skull to the thorax, where they communicate with the 

 lymphatic glands in that cavity. 



The superficial and deep cervical lymphatics are a continuation of those already 

 described on the cranium and face. After traversing the glands in those regions, 

 they pass through the chain of glands which lie along the sheath of the carotid 

 vessels, being joined by the lymphatics from the pharynx, oesophagus, larynx, 

 trachea, and thyroid gland. At the lower part of the neck, after receiving 

 some lymphatics from the thorax, they unite into a single trunk, which termi- 

 nates on the left side, in the thoracic duct ; on the right side, in the right lym- 

 phatic duct. 



