Boojho and Paheli were eating their food hurriedly so that they could go out and play during the recess. Suddenly, Boojho started coughing violently. Think of the reasons why he was coughing and discuss with your friends.

Pharynx is a common passage for food and air. This is a place which has openings for both food pipe and windpipe. A cartilaginous flap called epiglottis prevents the entry of food into the wind pipe by covering the opening of windpipe during swallowing. When we eat the food in hurry the epiglottis gets confused between the windpipe and the food pipe and the food goes into the wind pipe thus causing violent coughing. So we must never eat our food in hurry.