210 THE POCKET ANATOMY 



Capsular ligaments, lined with synovial membrane, sur- 

 round the articulations between the cricoid and inferior 

 cornua of the thyroid, and also between the cricoid and two 

 arytenoid cartilages. 



The hyo-epiglottic ligament connects the lower part of the 

 anterior surface of the epiglottis to the upper border of hyoid 

 bone. 



The thyro-epiglottic ligament connects the apex of the 

 epiglottis to the upper part of the receding angle of the 

 thyroid cartilage. 



THE INTERIOR OF THE LARYNX. 



The cavity of the larynx extends from the superior aperture 

 to the lower border of the cricoid cartilage. The vocal cords 

 form an imperfect diaphragm, dividing the cavity into two 

 parts. The chink between the true vocal cords is the glottis 

 or rima glottidis, which is the narrowest part of the larynx. 

 The whole is lined by mucous membrane. 



The superior aperture of the larynx is triangular in shape. 

 with base directed forwards. In front is the epiglottis, 

 behind are the summits of the arytenoid cartilages and 

 cornicula, and, laterally, the aryteno-epiglottic folds pass 

 between the lateral edges of the epiglottis backwards to the 

 tips of the arytenoid cartilages and cornicula, enclosing the 

 cuneiform cartilages. 



The superior or false vocal cords, one on each side, are 

 two folds of mucous membrane enclosing the superior thyro- 

 arytenoid ligaments ; each is placed above the corresponding 

 ventricle. 



The inferior or true vocal cords, one on each side, are 

 attached in front to the receding angle of the thyroid carti- 

 lage, and behind to the anterior angle or vocal process at the 

 base of the arytenoid cartilage. They are formed of mucous 

 membrane, enclosing the inferior thyro-arytenoid ligaments. 



The ventricles of the larynx are the fossae between the false 

 and true vocal cords ; the anterior part of each ventricle is 

 prolonged upwards between the false vocal cord and the 

 ala of the thyroid cartilage into a pouch, the sacculus laryngis. 

 The opening of the sacculus into the ventricle is narrow, and 

 its cavity contains numerous small glands. 



The muscles of the larynx have been described (vide 

 pp. 30 and 31). 



The arteries of the larynx are the laryngeal branches of 

 the superior and inferior thyroid. 



