Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of
(a) The epiglottis is a flap that is made of elastic cartilage tissue covered with a mucous membrane,
attached to the entrance of the larynx. It prevents the entry of food into the larynx, and directs it to the oesophagus. Due to the improper movement of epiglottis, one may suddenly start coughing while swallowing some food.