284 



HEAD AND NECK 



Venae Pharyngese. The pharyngeal veins lie mostly upon 

 the posterior wall and the borders of the pharynx, where they 

 anastomose together in a plexiform manner. They constitute, 

 collectively, the pharyngeal venous plexus, which receives 

 blood from the pharynx, soft palate, and prevertebral region. 

 It communicates with the pterygoid plexus and the cavernous 



I'uccinator. 

 Tensor veli palatini. 

 Levator veli palatini. 

 Superior constrictor. 

 Middle constrictor. 

 Inferior constrictor. 

 Thyreo-hyoid. 

 Hyoglossus. 

 Stylo-hyoid. 

 Mylo-hyoid. 

 '. Crico-thyreoid. 

 Stylo-pharyngeus. 

 Stylo-glossus. 

 Stylo-hyoid ligament. 

 Pterygo-mandibular raphe. 

 Glosso-pharyngeal nerve. 

 Superior laryngeal artery. 

 Superior laryngea! nerve. 

 External laryngeal nerve. 

 Inferior laryngeal nerve and 

 artery. 



FIG. 107. Profile view of the Pharynx to show the Constrictor Muscles. 

 (From Turner.) 



sinus. Two or more channels carry the blood from it to the 

 internal jugular vein. 



Constrictor Muscles. The constrictor muscles are three 

 pairs of curved sheets of muscular fibres which are so arranged 

 that they overlap each other from below upwards ; thus, the 

 inferior constrictor overlaps the lower part of the middle 

 constrictor, whilst the middle constrictor, in turn, overlaps the 



