====== LARYNGEAL CAVITY  ======


  * Laryngeal cavity 
    * extent 
      * inlet of larynx to lower border of cricoid cartilage 
    * inlet of larynx 
      * placed obliquely 
      * bounded 
        * anteriorly 
          * epiglottis 
        * posteriorly 
          * interarytenoid fold of mucous membrane 
        * each side 
          * aryepiglottic fold 
    * mucous membrane 
      * folds 
        * upper fold 
          * vestibular fold 
            * space between two folds is 
              * rima vestibuli 
        * lower fold 
          * vocal fold 
            * space between two folds is 
              * rima glottidis 
                * limited posteriorly by 
                  * interarytenoid fold 
          * attached 
            * anteriorly 
              * middle of angle of thyroid cartilage on its posterior aspect 
            * posteriorly 
              * vocal process of arytenoid cartilage 
       * folds divide the cavity in to 3 parts 
         * above vestibular fold 
           * vestibule of larynx or supraglottis 
         * between vestibular fold and vocal folds 
           * sinus or ventricle of larynx ( sinus of morgagni )
             * anterior part is prolonged upwards as a diverticulum 
               * between vestibular fold and lamina of thyroid cartilage 
                 * saccule of larynx 
                 * oil can of larynx
                   * helps in lubrication of vocal folds 
         * below vocal folds 
           * infraglottis 
           *