The epiglottis is a vital structure located in the throat that serves to protect the airway and facilitate swallowing. It is a small, leaf-shaped flap of cartilage that covers the larynx and prevents food or liquid from entering the windpipe. Inflammation of the epiglottis, known as epiglottitis, can occur due to infection or injury, and can potentially be life-threatening. The main function of the epiglottis is to ensure proper passage of food and air during swallowing.