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1 hyoid bone 2 epiglottis 3 vestibular fold, false vocal fold/cord, 4 vocal fold, true vocal fold, 5 Musculus ventricularis 6 ventricle of larynx 7 Musculus vocalis 8 Adam's apple 9 rings of cartilage 10 Cavum infraglotticum 11 first tracheal cartilage
The vestibular fold is one of two thick folds of mucous membrane, each enclosing a narrow band of fibrous tissue, the vestibular ligament, which is attached in front to the angle of the thyroid cartilage immediately below the attachment of the epiglottis, and behind to the antero-lateral surface of the arytenoid cartilage, a short distance above the vocal process.
The lower border of this ligament, enclosed in mucous membrane, forms a free crescentic margin, which constitutes the upper boundary of the ventricle of the larynx.
They are lined with respiratory epithelium, while true vocal cords have stratified squamous epithelium.