Topic 153 of 212 in the MU Plovdiv syllabus for Human Anatomy and Histology (Medicine, Years 1 and 2). The free AceMed note covers it in 9 sections, about 739 words (7 min of reading), with 23 flashcards.
In this note
LARYNX
Functions:
Cartilages of the larynx:
Ligaments:
Laryngeal Cavity:
Muscles of the larynx:
Blood Supply of the larynx:
Innervation:
Introduction
LARYNX
It is a hollow musculo-ligamentous structure with a cartilagnous framework.
Site: it present in the front of the neck (anterior to the phalynx), and extends btw. C4 and C6 vertebrae.
The cavity of the larynx continuous with the trachea, and above opens into the pharanyx
Functions:
Acts as valve to close lower respiratory tract protecting it from passage of foreign bodies
An instrument for sound production.
Cartilages of the larynx:
→ 3 Single:
Thyroid: formed of 2 plates connected anteriorly giving (Adam's apple).
Cricoid: is ring like and continue below larynx as the trachea.
Epiglottis: a leaf like cartilage behind the tongue, closes the laryngeal inlet during deglutition.
→ 3 paired:
Aretynoids:triangular in shape, having apex, base, and two processes (vocal process anteriorly, and muscular process laterally. They articulate with cricoid cartilage.
Corniculates:conical cartilages. Their bases articulate with apices of arytenoid cartilages.
Cuneiforms: club-shaped cartilages They are susbended by the fibro-elastic membrane of the larynx.
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