<prompt> False about larynx ?9 cailages - 3 paired and 3 unpaired.Extends from C3 to C6 veebrae.External laryngeal nerve supplies all laryngeal muscles except cricothyroid.Cricothyroid is a tensor of vocal cord.  <response>: Larynx is made up of 9 cailages : 3 paired 3 unpaired. It extends from C3 - C6 veebral level. All laryngeal muscles are supplied by recurrent laryngeal nerve except cricothyroid supplied by external laryngeal nerve. Cricothyroid tenses the vocal cord . 