TONGUE. Tongue. derived from 1 st -4 th branchial arches manipulates food for chewing and swallowing contains no bony supports for the muscles the extrinsic muscles of the tongue anchor the tongue firmly to surrounding bones and prevent the mythical possibility of 'swallowing' the tongue
protrudes the tongue as well as depressing its center.
depresses the tongue.
elevates and retracts the tongue.
pharyngeal branch of vagus nerve
depresses the soft palate, moves the palatoglossal fold towards the midline, and elevates the back of the tongue.Extrinsic Muscles of the Tongue