My answer is a flap of cartilage at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe."It is particularly important to understand the relationship of the following structures: the epiglottis , arytenoid cartilage, aryepiglottic folds, and cricoid cartilage.", close the larynx when eating,chewing a food
>Hope it helps
don't copy my answer,it is based on my mind !!