The structure, which covers the glottis, during swallowing of food is made up of

When the process of swallowing occurs, a thin, elastic, cartilaginous flap known as the epiglottis covers the glottis. This crucial mechanism serves to safeguard the larynx from the entry of food and liquids.

The epiglottis is a specialized cartilaginous structure located at the base of the tongue, just above the glottis, which is the opening of the larynx. The epiglottis is made up of elastic cartilage, which gives it the flexibility to move and change shape as needed during swallowing.