THE MOUTH AND THROAT. 



pillar runs from the soft palate to the tongue and is formed by the palatoglossus 

 muscle. The posterior pillar runs from the soft palate downward to the sides of the 

 pharynx and is formed by the palatopharyngeus muscle. In front of these arches and 



Pharyngeal tonsil 



Fossa of Rosenmuller 

 Eustachian tube 



Supratonsillar fossa 



Pterygomandibular fold 

 Plica triangularis 



Anterior pillar 

 Faucial tonsil 

 Posterior pillar 



Epiglottis 



FIG. 141. Lateral view of the faucial tonsil and pharyngeal region 



running from the roof of the mouth opposite the posterior edge of the last molar tooth 

 downward to the posterior edge of the alveolar process of the lower jaw is an elevation 

 of the mucous membrane which shows the line of junction of the hard and soft palates. 



FIG. 142. Diagram illustrating the blood supply of the faucial tonsil. 



Faucial Tonsils. Between the pillars of the fauces lie \\\e faucial tonsils. 

 They are limited above by the sulcus, called the Supratonsillar fossa, formed by the 

 approximation of the pillars and a fold of mucous membrane, called the plica trian- 

 gularis (His), running downward from the anterior pillar and often blending with 



