1286 



A MANUAL OF ANATOMY 



notes, the vocal cords become so closely approximated as to be 

 practically parallel, and the glottis vocalis assumes the form of a 

 narrow chink. 



Ventricle » 



Epiglottis and its Cushion 



False Vocal Cord _\ 



True Vocal Cord ., 



Cuneiform Cartilage 



Corniculum Laryngis — -" 

 Tip of Arytenoid Cartilage -"' 



Trachea 



Right and Left Bronchi '*=" 



Fig. 534. — The Superior Aperture of the Larynx and the Rima 



Glottidis, as seen by the Aid of the Laryngoscope under I 

 Different Conditions, ' 



(The Figures on the left side are copied from Czermak). 



A, Ordinary quiet inspiration 



B, Very deep inspiration 



C, Vocalization, especially in singing high notes 

 R.G. Rima Glottidis 



Mucous Membrane of the Larynx. — ^This is continuous above with 

 the mucous membrane of the pharynx, and below with that of the 

 trachea. Above the level of the rima glottidis its subjacent attach- 

 ment is of a loose nature on account of the presence of submucous 

 areolar tissue, particularly in the vicinity of the aryteno-epiglottidean 

 folds, a condition which favours the occurrence of oedema, but over 

 the laryngeal surface of the epiglottis it is firmly attached. Over 

 the true vocal cords it is very thin, and is firmly connected to the 

 inferior thyro-arytenoid ligaments, which they contain. The 

 membrane is covered by ciliated columnar epithelium, except 

 (i) near the margin of the aryteno-epiglottidean folds, where it is 

 of the stratified squamous variety, as in the laryngeal portion of 

 the pharynx and the buccal cavity ; and (2) over the true vocal 

 cords, where it is also of the stratified squamous variety. Bodies 

 resembling the taste-buds of the tongue are met with on the 



