The '''epiglottis''' is a flap made of [[elastic cartilage]] tissue covered with a [[mucous membrane]], attached to the entrance of the [[larynx]]. It projects obliquely upwards behind the [[tongue]] and the [[hyoid bone]], pointing dorsally. It stands open during breathing, allowing air into the larynx. During [[swallowing]], it closes to prevent [[pulmonary aspiration|aspiration]], forcing the swallowed liquids or food to go down the [[esophagus]] instead. It is thus the valve that diverts passage to either the [[trachea]] or the esophagus.