The laryngeal cavity extends from the inlet of the larynx to the lower border of the cricoid cartilage. It is divided into three regions by the vestibular and vocal folds. The vestibule lies between the laryngeal inlet and vestibular folds. The ventricles are located between the vestibular and vocal folds, bulging out on each side. The infraglottic region is below the vocal folds, extending to the lower opening of the larynx. The document provides detailed anatomical descriptions of these regions and their boundaries.

1. Cavity of Larynx
MOHAMED AKMAL KHAN
MBBS (7TH SEM)
IIMS&R, LUCKNOW

2. Index
 Introduction
 Inlet of larynx
 Vestibular folds
 Vocal folds
 Vestibule
 Ventricle
 Infraglottic
 Applied

3. Introduction
 Laryngeal cavity is a tubalar shaped cavity.
 It extends from the inlet of larynx to the lower
border of cricoid cartilage
 Superiorly it opens into the anterior aspect of the
pharynx just below and posterior to the tongue.
 Inferiorly it continues with trachea.

4. Inlet of larynx-
 Oblique opening
 Boundaries-
Anterior- Epiglottis
Posterior- Interarytenoid fold
Sides- Aryepiglottic folds

5. Divided into three regions by 2 folds of mucous
membrane on each side-
1. Vestibular folds
2. Vocal folds

6. Vestibular folds
 Two in numbers.
 Each is a fold of mucous membrane
 Extends anterioposteriorly across the laryngeal
cavity.
 Contains vestibular ligament, few fibres of
thyroarytenoideus muscle and mucous gland.
 Opening between the two fold is called Rima
Vestibuli.

7. Vocal folds
 Also two in number
 Pearly white sharp band extending from the middle
of thyroid angle to the vocal processes of arytenoids.
 Each consists of vocal ligament.
 Opening between the adjacent vocal folds is called
Rima glottidis

8. Superior view of larynx through the laryngeal inlet as
viewed by laryngoscope

9. Regions/Parts
 Divided into 3 parts-
1. Vestibule or Supraglottis
2. Ventricles
3. Infraglottic or Subglottic

10. Vestibule
 Lies between laryngeal inlet
and vestibular fold (false cords)
 Boundaries:-
Anterior- Posterior surface of epiglottis
Posterior- Mucus memb. over anterior
surface of arytenoids.
Sides- By Aryepiglottic folds
Posterior view of laryngeal cavity

11. Ventricle
 Lies between
vestibular and vocal cords.
 The mucosa bulges on
each side to produce an
expanded trough-shaped cavity.
 Tubular extension of
ventricle projecting anterosuperiorly
b/w vestibular fold and thyroid
cartilage is called Saccule.
Posterior view of laryngeal cavity

12. Infraglottic
 Lies between vocal folds and inferior opening of
larynx i.e lower border of cricoid cartilage.

13. Applied anatomy
 Singer’s nodule
 Large foreign body lodge in inlet.
 Small foreign body lodge in ventricle
 Laryngocele