308 LABORATORY MANUAL OF HUMAN ANATOMY 



(b) Lateral glosso-epiglottic fold (plica glosso-epiglottica lateralis) (0. 



T. lateral glosso-epiglottidean folds). 



(c) Epiglottic vallecula (vallecula epiglottica}. 



Cavity of Larynx (Cavum laryngis). (Vide Figs. 125, 134, and 135.) 

 Look into it from above, the epiglottis being pulled well for- 

 ward, and observe its subdivision by the true and false vocal 

 cords into three portions, the " upper subdivision," or vesti- 

 bule of the larynx, the ' * middle subdivision, ' ' corresponding to 

 the ventricles of the larynx, and the " inferior subdivision, " 

 below the true vocal cords or folds. 



FIG. 134. 



Radix linguae 



Epiglottis 

 / Tuberculum epiglotticum 



Vallecula epiglottica v 



lateralis 

 Plica 

 pharyngoepiglottica - 



Aditus laryngis 



Plica ary epiglottica..- . 



Rima 

 glottidis 



pars inter- 

 membranacea. 



pare inter- - 

 cartilaginea 



Tunica mucosa pharyngls 



Plica vocalis 



Plica ventricularis 



....Recessus piriformis 



"^Tuberculum cuneiforme 



[Wrisbergi] 



"""Tuberculum corniculatum 

 [Santorini] 



Tncisura interarytaenoidea 



Cavity of the larynx viewed from above. (After Spalteholz, Hand Atlas 

 of Hum. Anat., Leipzig, 1903, vol. iii. p. 559, Fig. 613.) 



The entrance to the larynx, or superior aperture (aditus 

 laryngis), may now be observed. What is its shape? How is it 

 bounded? The aryepiglottic fold (plica ary epiglottica) (0. T. 

 arytaeno-epiglottidean fold) extends, on each side, from the lat- 

 eral margin of the epiglottis in front to the tip of the arytaenoid 

 cartilage behind. Note that it is formed by the junction of the 

 tunica mucosa pharyngis with the tunica mucosa laryngis. In 

 it near its posterior extremity are two tubercles, the cuneiform 

 tubercle (tuberculum cuneiforme [Wrisbergi]) and the cornicu- 

 late tubercle (tuberculum corniculatum [Santorini]), on each 



