Anatomy of Larynx PPT: Functions, Diagram, Components

The larynx, commonly known as the voice box, is a complex organ located in the neck. It plays a vital role in breathing, phonation, and protecting the airway during swallowing. This intricate structure connects the pharynx to the trachea and is situated at the level of the C3 to C6 vertebrae.

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Anatomy of Larynx PPT: Functions, Diagram, Components

Contents

Structural Components
Vocal Cords and Glottis
Laryngeal Muscles
Blood Supply and Innervation
Protective Mechanisms
Table of Content for Anatomy of Larynx Seminar

Structural Components

The larynx is primarily composed of cartilage, muscles, ligaments, and membranes. The cartilaginous framework consists of three unpaired cartilages—thyroid, cricoid, and epiglottis—and three paired cartilages—arytenoid, corniculate, and cuneiform. These structures provide the necessary support and shape to the larynx.

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Vocal Cords and Glottis

The larynx houses the vocal cords, essential for sound production. These cords are paired elastic tissues that stretch across the laryngeal cavity. Between the cords is the glottis, the opening responsible for sound modulation. Movements of the vocal cords and glottis are controlled by intrinsic muscles of the larynx.

Laryngeal Muscles

The larynx includes intrinsic and extrinsic muscles. Intrinsic muscles, such as the cricothyroid and thyroarytenoid muscles, regulate tension and position of the vocal cords. Extrinsic muscles, including the sternohyoid and thyrohyoid, stabilize and position the larynx during swallowing and speech.

Blood Supply and Innervation

The blood supply to the larynx comes primarily from branches of the superior and inferior thyroid arteries. Innervation is provided by the vagus nerve, with the superior and recurrent laryngeal nerves playing key roles in sensory and motor functions.

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Protective Mechanisms

The epiglottis, a leaf-shaped cartilage, prevents food and liquid from entering the airway during swallowing by covering the glottis. This protective mechanism is crucial for maintaining respiratory health.