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SPLANCHNOLOGY 



The Ventricle of the Larynx (ventriculus laryngis [Morgagnii]; laryngeal sinus) 

 is a fusiform fossa, situated between the ventricular and vocal folds on either side, 

 and extending nearly their entire length. The fossa is bounded, above, by the free 

 crescentic edge of the ventricular fold; below, by the straight margin of the vocal 

 fold; laterally, by the mucous membrane covering the corresponding Thyreoary- 

 tsenoideus. The anterior part of the ventricle leads up by a narrow opening 

 into a cecal pouch of mucous membrane of variable size called the appendix. 



The appendix of the laryngeal ventricle (appendix ventriculi laryngis; laryngeal 

 saccule) is a membranous sac, placed between the ventricular fold and the inner 

 surface of the thyroid cartilage, occasionally extending as far as its upper border 

 or even higher; it is conical in form, and curved slightly backward. On the surface 

 of its mucous membrane are the openings of sixty or seventy mucous glands, which 



Sulcus terminalis 



Foramen cecum 



Vattecula 



Lateral gloaso- 

 epiglottic fold 



Tubercle 



Aryepiglottic fold 



Glottis 



Cuneiform cartilage 



Corniculate cartilage 



piglottic fold 



Greater cornu of _ 

 hyoid bone 



Sup. cornu of A 



thyroid cart. jg 



Ventricular fold 

 Ventricle 



Vocal fold 

 Pyriform sinus 



FIG. 955. The entrance to the larynx, viewed from behind. 



are lodged in the submucous areolar tissue. This sac is enclosed in a fibrous 

 capsule, continuous below with the ventricular ligament. Its medial surface is 

 covered by a few delicate muscular fasciculi, which arise from the apex of the 

 arytenoid cartilage and become lost in the aryepiglottic fold of mucous membrane; 

 laterally it is separated from the thyroid cartilage by the Thyreoepiglotticus. 

 These muscles compress the sac, and express the secretion it contains upon the 

 vocal folds to lubricate their surfaces. 



The Rima Glottidis (Fig. 956) is the elongated fissure or chink between the 

 vocal folds in front, and the bases and vocal processes of the arytenoid cartilages 

 behind. It is therefore subdivided into a larger anterior intramembranous 

 part (glottis vocalis), which measures about three-fifths of the length of the 

 entire aperture, and a posterior intercartilaginous part (glottis respiratoria). 





