<prompt> Which of the following pharyngeal arches develops into epiglottis?1st pharyngeal arch2nd pharyngeal arch4th pharyngeal arch3rd pharyngeal arch  <response>: Pharyngeal archMuscular contributionsSkeletal contributionsNerveAery1st also called mandibular archMuscles of mastication, anterior belly of the digastric, mylohyoid, tensor tympani, tensor veli palatiniMaxilla, mandible only as a model for mandible not actual formation of mandible, the incus and malleus of the middle ear, also Meckels cailageTrigeminal nerveV2 and V3Maxillary aery, external carotid aery2nd also called the hyoid archMuscles of facial expression, buccinator, platysma, stapedius, stylohyoid, posterior belly of the digastricStapes, styloid process, hyoid lesser horn and upper pa of body, Reiches cailageFacial nerve VIIStapedial aery, hyoid aery3rdStylopharyngeusHyoid greater horn and lower pa of body, thymus, inferior parathyroidsGlossopharyngeal nerve IXCommon carotid, internal carotid4thCricothyroid muscle, all intrinsic muscles of soft palate including levator veli palatiniThyroid cailage, superior parathyroids, epiglottic cailageVagus nerve X, superior laryngeal nerveRight 4th aoic arch: subclan aeryLeft 4th aoic arch: aoic arch6thAll intrinsic muscles of larynx except the cricothyroid muscleCricoid cailage, arytenoid cailages, corniculate cailageVagus nerve X, recurrent laryngeal nerveRight 6th aoic arch: pulmonary aeryLeft 6th aoic arch: pulmonary aery and ductus aeriosus Ref: Langman Embryology, 11 Edition, pg. 277 