<prompt> Posterior one-third of the tongue develops fromLingual swellingsTuberculum imparHypobranchial eminenceTongue bud  <response>: Posterior one third is developed from cranial pa of hypobranchial eminence, which is formed by fusion of third and fouh branchial arches only. The eminence is divided by a transverse groove into cranial and caudal pa. Notes: posterior one third is supplied by glossopharyngeal nerve. 