Question

a) ? is a flap like structure which closes over b) ? during swallowing of food.​

Answer 1

Answer:

EPIGLOTTIS

Explanation:

epiglottis is a flap like structure which prevents the food while swallowing to enter trachea .

Answer 2

Explanation:

When you swallow, a flap called the Epiglottis moves to block the entrance of food particles into your larynx and lungs.