Question

What part of the respiratory system connects esophagus and trachea and is the passage for both food and air?

Answer 1

The part that connects both oesophagus and trachea is Pharynx.

Explanation:

Pharynx is a common passage for both food and air. There is a slit like opening in the pharynx called glottiss. This glottiss is covered by a flap like structure called epiglottiss. This prevents the food from entering into the trachea and allows to pass only into the oesophagus.