2 9 2 



HEAD AND NECK 



produce two rounded eminences, of which the anterior is the 

 cuneiform tubercle, and the posterior is the corniculate tubercle. 



On each side of the lower part of the laryngeal opening 

 there is a small three-sided or pyramidal depression, called the 

 recessus piriformis. On the lateral side each piriform recess is 

 bounded by the posterior part of the corresponding lamina 

 of the thyreoid cartilage and the corresponding part of the 

 thyreo-hyoid membrane ; on the medial side, by the arytaenoid 



Tongue 



Rima glotti 



Recessus piriform 



Superior cornu 

 of thyreoid 



Pharyngeal wall 

 (cut) 



Glosso-epiglottic 

 fold 



Vallecula 



Pharyngo- 

 epiglottic fold 



Epiglottis 



Tubercle of 

 epiglottis 



Ary-epiglottic 



fold 



Laryngeal ventricle 



Plica ventricularis 

 Cuneiform tubercle 



Corniculate 

 cubercle 



Mucous membrane 

 covering posterior 

 aspect of cricoid 

 cartilage 



FIG. in. 



-Superior Aperture of Larynx exposed by cutting through 

 the posterior wall of the pharynx. 



cartilage and the ary-epiglottic fold ; whilst its posterior wall 

 is formed by the posterior wall of the pharynx, when that is 

 in place. The piriform recess has a wide entrance, which 

 looks upwards ; but it rapidly narrows towards the bottom 

 (Figs, in and 112). It is of practical importance because 

 sharp-pointed bodies introduced into the pharynx are liable 

 to be caught in the walls of the sinus. 



Below the level of the opening of the larynx, the anterior 



