infraglottic cavity infraglottic cavity the infraglottic cavity is the portion of the larynx situated inferior to the glottis. it is situated between the vocal cords (superior limit), and the inferior border of the cricoid cartilage (inferior limit) where it is continuous with the trachea. infraglottic cavitycut through the larynx of a horse1 hyoid bone2 epiglottis3 vestibular fold4 vocal fold5 ventricularis muscle6 ventricle of larynx7 vocalis muscle8 thyroid cartilage lamina 9 cricoid cartilage10 infraglottic cavity11 first bronchial tube cartilage12 bronchial tubedetailsidentifierslatincavitas infraglotticata98a06.2.09.018ta23211fma55311anatomical terminology on transverse section, the infraglottic cavity appears elliptical in shape superiorly, and circular in shape inferiorly. it is wider inferiorly. the walls of the infraglottic cavity are lined with respiratory epithelium. structural support is provided by the cricothyroid ligament above, and the cricoid cartilage below.