THE VEINH Of-' THE NECK 



717 



caroticus internus) surrounds the internal carotid artery in the carotid canal and 

 empties into the internal jugular vein. At its point of junction with the common 

 facial vein it becomes increased in size. (See Facial Veins, p. 712.) 



The inferior petrosal sinus leaves the skull through the anterior compartment 

 of the jugular foramen, and joins the vein near its commencement. Sometimes 

 the inferior petrosal sinus is not a direct tributary of the internal jugular vein, 

 the blood being conveyed to it by a venous plexus in the hypoglossal canal. 



STERNOMASTOID 

 MUSCLE 



TEMPORO- 

 MAXILLARY 



DESCENDENS 



HYPOGLOSSI 



NERVE 



COMMON 



CAROTID 



ARTERY 



TRANSVERSE 

 CERVICAL 



SUBCLAVIAN 



Flo. 497. The veins of the neck, viewed from in front. 



(Spalteholz.) 



The lingual veins (vv. linyuales) (Fig. 496) commence on the dorsum, sides, and 

 under surface of the tongue, and, passing backward along the course of the lingual 

 artery and its branches, terminate in the internal jugular. The ranine vein, 

 a tributary of considerable size commencing below the tip of the tongue, may 

 join the lingual; generally, however, it passes backward on the Hvoglossus muscle 

 in company with the hypoglossal nerve, and joins the facial. The lingual veins 

 receive the sublingual and the dorsal lingual veins. 



The pharyngeal veins (vv. pharyngeaej commence in the pharyngeal plexus on 

 the wall of the pharynx, and, after receiving meningeal tributaries, the dural or 

 meningeal veins, the Vidian veins, and the sphenopalatine veins, terminate in 

 Ac-internal jugular. They occasionally open into the facial, lingual, or superior 

 thvroid vein. 



