2. Laryngeal cavity is lined by the respiratory
epithelium except the vocal cords and parts
of epiglottis, which is lined by the stratified
squamous epithelium.
The cavity starts at the laryngeal inlet where
it communicates with the pharynx and ends
at the lower border of the cricoid cartilage
where it continues with the lumen of
trachea.
4. The laryngeal inlet is bounded –
Anteriorly – free margin of epiglottis
Laterally – Aryepiglottic fold
Posteriorly – Interarytenoid fold
5. Laryngeal interior is divided by two folds
into three parts –
Supraglottis
Vestibule
Ventricle
Glottis
Subglottis
DIVISIONS
6. Folds dividing the cavity are –
Vestibular folds –
False vocal cords
Two in number
Each is fold of mucous membrane
extending anteroposteriorly across
laryngeal cavity
Contains vestibular ligament, few fibres
of thyroarytenoideus muscle and mucous
glands
7. Vocal folds –
True vocal cords
Two pearly-white shaped bands
extending from the middle of thyroid
angle to vocal processes of arytenoids
Each vocal cord consists of vocal
ligament
9. Extends from laryngeal inlet to vestibular
folds
Anterior wall formed by posterior surface
of epiglottis
Sides by aryepiglottic folds
Posterior wall by mucous membrane over
anterior surface of arytenoids
VESTIBULE
11. Diverticulum of mucous membrane which
starts from the anterior part of ventricular
cavity and extends upwards between
vestibular folds and lamina of thyroid
cartilage
Laryngocele – air containing sac present in
the neck
Presence of mucous glands
SACCULE OF LARYNX
12. Rima glottidis
Elongated space between vocal cords anteriorly
and vocal processes and arytenoids posteriorly
24mm in men and 16mm in women
Narrowest part of laryngeal cavity
Anterior two-thirds formed by membranous
cords and posterior one-third by vocal processes
of arytenoids
GLOTTIS