Question

(a)The two openings of pharynx, one leading to trachea and other to oesophagus, lie very close
to each other. Yet food we swallow normally does not enter our trachea. Why?
(b) What is the role of hydrochloric acid in human digestive system?

Answer 1

Answer:

(a)food we eat does not enter to our trachea because there is epiglottis present on it which prevents food to enter in the trachea and when we eat epiglottis cover the treachea it's just work like lid so that the food can't enter the treachea.

(b) hydrochloric acid helpful in the digestive system

Answer 2

This is because the entrance to the trachea is guarded by a flap called the epiglottis.

Hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins.