Which laryngeal cartilage is elastic-

Ans. A. EpiglottisLaryngeal cartilages-The laryngeal cartilages are the single thyroid, cricoid and epiglottic cartilages, and the paired arytenoid, cuneiform, corniculate and tritiate cartilages. The corniculate, cuneiform, tritiate and epiglottic cartilages and the apices of the arytenoid are composed of elastic fibrocartilage, with little tendency to calcify. The thyroid, cricoid and the greater part of the arytenoid cartilages consist of hyaline cartilage and may undergo mottled calcification as age advances, starting about the 25th year in the thyroid cartilage and somewhat later in the cricoid and arytenoids. By the 65th year, these cartilages commonly appear patchily dense in radiographs. In relation to the surface anatomy of the larynx, the levels of the laryngeal cartilages worth noting are: C3 (level of body of hyoid and its greater cornu); C3-4 junctions (level of upper border of thyroid cartilage and bifurcation of common carotid artery); C4-5 junctions (level of thyroid cartilage); C6 (level of cricoid cartilage).