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What is Epiglottis is derived from ? and explain in detail?
Ans. is 'b' i.e., 4th archAll cailages of larynx (except arytenoid) are derived from 4th arch - epiglottis, cricoid, thyroid, corniculate and conciform.Arytenoid is derived from 6" arch.See explanation-8 of session-1.NoteDevelopment of laryngeal cailages is controversial. According to some textbooks, all laryngeal cailages are derived from 4th arch, except arytenoids, which is developed from 6th arch. But some other textbooks say that thyroid, epiglottis and cuneiform are derived from 4th arch whereas corniculate, arytenoid and cricoid are derived from 6" arch.However, there is no confusion about following facts :?All cailages of larynx are developed from 4th and 6" arch.Epiglottis, thyroid and cuneiform are derived from 4" arch.