954 



HUMAN ANATOMY. 



Basal vesse 



Principal 

 node of 

 tongue 



Superior 



deep 



cervical 



node 



Apical 



vessels 



Submental 

 node 



Lateral 



vessels 

 Apical 



vessels 



to the right and in some to the left, between the genio-hyo-glossus and the genio- 

 hyoid muscles, perforate the mylo-hyoid, and terminate in the submaxillary nodes. 

 The remaining three or four stems pass backward along the mylo-hyoid muscle 

 and, emerging at its posterior border, pass to the superior deep cervical nodes. 



From this account it will be seen that four different groups of nodes stand in 

 relation to the lymphatics of the tongue. ( i ) The submental nodes receive a stem 

 from the tip ; (2) the submaxillary nodes receive stems from the marginal and cen- 

 tral regions ; (3) the superior deep cervical nodes receive stems from the marginal, 

 central, and basal regions ; and (4) the inferior deep cervical nodes receive a stem 



from the apical region. 

 Fig. 805. I" addition it may be 



mentioned that many 

 of the stems have upon 

 their course one or more 

 of the small ' ' inter- 

 calated " lingual nodes 

 ( page 948 ). Special 

 importance, however, 

 attaches to that supe- 

 rior deep cervical node 

 already mentioned as 

 occurring at about the 

 level of the bifurcation 

 of the common carotid 

 artery, on account of 

 the numerous af?erents 

 it receives from the 

 tongue. 



The lymphatics of 

 the floor of the viouth 

 have essentially the same 

 terminations as those of 

 the tongue. The stems 

 which arise from its 

 anterior half pass with 

 the stems from the tip 

 of the tongue to the inferior deep cervical nodes, while from its entire surface stems 

 pass to the submaxillary and superior deep cervical nodes. 



The Palate, Pharynx, and Tonsils. — The lymphatics of the hard palate form 

 a fine net-work in the superficial portions of the mucous membrane and are continuous 

 laterally with those of the upper gum. They empty into several stems which pass 

 backward in the median line of the palate and at about the level of the last molar 

 teeth bend outward to, the right and left, and, passing in front of the anterior pillars 

 of the fauces, pierce the superior constrictor of the pharynx to terminate in those 

 superior deep cervical nodes which are situated on the internal jugular vein above the 

 level at which it is crossed by the posterior belly of the digastric muscle. 



The net-work of the soft palate is exceedingly close and especially so in the 

 uvula, which in a successful injection of the lymphatics may treble its volume, be- 

 coming exceedingly turgid (.Sappey). Stems emerging from the net-work pass 

 toward both surfaces of the palate, those lying below the upper surface passing back- 

 ward and outward to join the stems from the nasal mucous membrane just below 

 the orifice of the Eustachian tube, whence their course is similar to that of the nasal 

 stems. Some of them pass upward and backward to perforate the superior con- 

 strictor of the pharynx and terminate in the lateral retropharyngeal nodes, while 

 others descend beneath the mucous membrane covering the posterior pillars of the 

 fauces and, after perforating the superior constrictor, terminate in the upper nodes 

 of the superior deep cervical group. 



Lytnphatics of tongue. {I'uhier.*) 



* Gazette hebdomadaire, 1902. 



