472 



ELEMENTARY ANATOMY. 



[LESS. 



Each of the two lower processes of the posterior margins ot 

 the thyroid articulates with the side of the cartilage next to 

 be described. 



This latter, the cricoid 1 - cartilage, forms a complete ring, 

 deepest behind (where the thyroid is open), placed beneath 

 the thyroid cartilage, and forming the uppermost ring of the 

 trachea, with both of which parts it is connected by mem- 

 brane. 



The arytenoid 2 cartilages are two in number, placed side 

 by side, at a little distance from each other, on the posterior 



FIG. 398. DIAGRAM OF THE LARYNX, the thyroid cartilage being supposed to be 

 transparent, and allowing the right ar.\ tenoid cartilage (A r), vocal ligament ( I'), 

 and thyro -arytenoid muscle ( Th A ), the upper part of the cricoid cartilage (Cr), 

 and the attachment of the epiglottis (Ep) to be seen. C th, the right crico- 

 thyroid muscle ; Tr, the trachea ; Hy, the hyoid bone. 



and highest part of the cricoid cartilage. Each arytenoid 

 cartilage is pyramidal in form, and at the apex of each is 

 placed an additional and minute cartilage, called that of 

 SantorinL 



The epiglottis* is a median, azygos cartilage, shaped 

 somewhat like a leaf, placed in front of the upper opening 

 of the larynx within the thyroid cartilage and the cornua of 

 the hyoid. It ends in a narrow termination below, where it is 

 attached by ligament to the depression at the front part of the 

 inner surface of the thyroid cartilage. 



1 From KpiKog, a ring, and eidog. 



2 From upvTiitvn, a sort of pitcher, and e?5of." 



3 From en-/, upon, and -yXw-rT/g, the aperture of the windpipe. 



