Epiglottis

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Epiglottis in situ - Copyright Nottingham

Introduction

The epiglottis is a flap of elastic cartilage covered by mucous membrane. It forms the rostral boundary of the larynx and prevents food particles from entering the trachea.

The epiglottis can return to its normal size and shape after distortion due to the vast amount of elastic fibres present within.

Epiglottic Cartilage - Copyright RVC

Epiglottis Histology - Copyright RVC

Histology

• Covered by mucous membrane

• Irregular elastic fibres
  • Dense network of branching fibres around the chondrocytes
  • Less dense branching fibres towards the perichondrium

Species Differences

Avian

• No epiglottis

Epiglottis Histology - Copyright RVC

Links

Larynx - Anatomy & Physiology

Aspiratory Pneumonia