2 Diagrams of the larynx and vocal folds. (a) Midsagittal view of the head and neck indicating the location of the
larynx and tracheas,(b) schematic diagram showing how the vocal folds are located at the superior end of the trachea and
coupled to the supraglottal vocal tract,(c) superior view of larynx when the vocal folds are abducted,as during respiration,
and (d) superior view of larynx when the vocal folds are adducted,as during phonation