The prevents food or liquids from getting into the lungs.

the Epiglottis prevents food or liquids from entering the lungs.

Explanation:

when you swallow it covers the enterance to the lungs. Hope this helps :)

Epiglottis

Explanation:

During breathing, air travels from your mouth and pharynx into the larynx (toward your lungs). When you swallow, a flap called the epiglottis moves to block the entrance of food particles into your larynx and lungs. That prevents food from entering your lungs.