Cervical Veins and Lymphatics in Human Embryos. 41 



Fig. 6. The relation of the linguo-facial vein to the jugular veins in the 

 adult. (From dissections.) 



A. The primary relation. The linguo-facial vein is a branch of the internal 

 jugular; its submental, anterior facial, lingual, and posterior facial branches 

 are shown in the drawing. The linguo-facial vein has only small anastomoses 

 with the external jugular vein, and none with the anterior jugular, the latter 

 vessel being scarcely represented in this case. The similarity to the embryonic 

 relations shown in Fig. 4 is apparent. 



B. The linguo-facial vein has been tapped by the external jugular so that its 

 branches appear to belong to the latter. 



C. The linguo-facial vein is drained chiefly by the anterior jugular, to which 

 its branches appear to belong. 



D. The linguo-facial vein is sub-divided, so that its posterior facial branch 

 empties into the external jugular, its anterior facial branch empties into the 

 anterior jugular, and the lingual branch remains as a tributary of the internal 

 jugular. 



