# The space between the vocal folds is called as:
A. Rima vestibuli
B. Rima glottidis
C. Rima laryngeus
D. Rima arytenoid
The correct answer is B. Rima glottidis.
Within the cavity of larynx there are two folds of the mucus membrane on each side. The upper fold is the vestibular fold and the lower fold is the vocal fold.
The space between the right and left vestibular folds is the rima vestibuli; and the space between the vocal folds is the rima glottidis.
The vestibular and vocal folds divide the cavity of the larynx into three parts:
1. The part above the vestibular fold is called the vestibule of the larynx.
2. The part between the vestibular and vocal folds is called the sinus or ventricle of the larynx.
3. The part below the vocal folds is called the infraglottic part.
The sinus of Morgagni or ventricle of the larynx is a narrow fusiform cleft between the vestibular and vocal folds. The anterior part of the sinus is prolonged upwards as a diverticulum between the vestibular fold and the lamina of the thyroid cartilage. This extension is known as the saccule of the larynx. The saccule contains mucous glands which help to lubricate the vocal folds.
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