780 THE VASCULAR SYSTEMS 



The lymphatic vessels of the scalp are divisible into (a) those of the frontal 

 region, which terminate in the parotid nodes; (6) those of the temporoparietal 

 region, which end in the parotid and posterior auricular nodes; and (c) those 

 of the occipital region, which terminate partly in the occipital glands and partly 

 in a trunk which runs down along the posterior border of the Sternomastoid 

 to end in the lower group of deep cervical nodes. 



The lymphatic vessels of the pinna and external auditory meatus are also divisible 

 into three groups: (a) an anterior, from the outer surface of the pinna and anterior 

 wall of the meatus to the parotid nodes; (6) a posterior, from the margin of the 

 pinna, the upper part of its inner surface, the internal surface and posterior wall 

 of the meatus to the posterior auricular and upper deep cervical nodes; (c) an 

 inferior, from the floor of the meatus and from the lobule to the external jugular 

 and upper deep cervical nodes. 



The lymphatic vessels of the face are more numerous than those of the scalp. 

 Those from the eyelids and conjunctive terminate partly in the submaxillary, 

 but mainly in the parotid nodes. The vessels from the posterior part of the 

 cheek also pass to the parotid nodes, while those of the anterior portion of the 

 cheek, the side of the nose, the upper lip, and the lateral portions of the lower 

 lip terminate in the submaxillary nodes. The deeper vessels from the temporal 

 and zygomatic fossae pass to the internal maxillary and upper deep cervical 

 nodes. The deeper vessels of the cheek and lips terminate, like the superficial, 

 in the submaxillary nodes. Both superficial and deep vessels of the central 

 part of the lower lip run to the suprahyoid nodes. 



The lymphatic vessels of the nasal fossae can be injected from the subdural and 

 subarachnoid spaces. Those from the anterior parts of the fossae terminate 

 in the submaxillary nodes; those from the posterior two-thirds of the fossa? and 

 from the communicating air sinuses pass partly to the retropharyngeal nodes 

 and partly to the upper deep cervical nodes. 



The lymphatic vessels of the mouth terminate as follows: (a) Those of the gums 

 terminate in the submaxillary nodes; (6) those of the hard palate terminate in 

 the upper deep cervical and subparotid nodes; (c) those of the soft palate, in the 

 retropharyngeal and upper deep cervical nodes; (d} those of the anterior part of 

 the floor of the mouth pass through the submental and suprahyoid nodes to the 

 upper deep cervical group; (e) those from the rest of the floor of the mouth ter- 

 minate in the submaxillary and upper deep cervical nodes. 



The lymphatic vessels of the tongue (Fig. 559) are drained chiefly into the deep 

 cervical nodes lying between the posterior belly of the Digastric and the posterior 

 belly of the Omohyoid; one node situated at the bifurcation of the common 

 carotid artery is so intimately associated with these vessels that it is known as 

 the principal node of the tongue. The apical vessels of the tongue pass to the 

 suprahyoid nodes and principal gland of the tongue; the marginal vessels pass 

 partly to the submaxillary and partly to the upper deep cervical nodes. The 

 base of the tongue in the region of the circumvallate papillae is drained by vessels 

 which terminate in the upper deep cervical nodes. 



The lymph nodes of the neck include the following groups. 



1. The Superficial Cervical, including the external jugular and the anterior 

 cervical. 



2. The Submaxillary. 



3. The Submental. 



4. The Retropharyngeal. 



5. The Deep Cervical. 



The superficial cervical nodes (lymphoylandulae cervicales superficiales) (Fig. 

 557) are composed of two groups, the external jugular and the anterior cervical 

 nodes. 



