18 



Muscles of the Pharynx. 



346. The Muscles of the Pharynx, side view, after 



removal of the Vertebral Column. 



The cavity behind the mouth, nose and larynx is called pharynx; 

 below, it is continuous with the oesophagus. The anterior wall of the 

 pharynx communicates with the nasal cavity by means of the two posterior 

 naves, Chocmae, with the mouth by means of the isthmus of the fauces and 

 with the larynx by means of the Aditus ad laryngcm. On each side of the 

 pharynx, at the back part of the inferior meatus, is the opening for the 

 Eustachian tube, Ostium pliaryngeum Tubac Eustaclui ; it is four lines long, 

 directed obliquely from within and above, externally and inferiorly, and 

 has irregular borders; between this opening and the posterior wall of the 

 pharynx, the mucous membrane is deepened, forming R o s enm ill 1 e v's 

 fossa. By means of the soft palate, when it comes in contact with the 

 posterior pharyngeal wall, the pharynx is divided into two cavities, the 

 Cavum pliaryngo-nasqlc, and Cavum plwryngo-laryngewm,. 



