Question

why should we breathe through the nose and through the mouth ?

Answer 1

Because nose has hair so it helps to take out the dirt which we have inhaled but not with the mouth because then we will take the un healthy air

Answer 2

When we inhale air, through our nose, the unwanted particles present in the air usually get trapped in the hair of the nasal cavity . But when we inhale through our mouth the dust particles present are not getting trapped , THUS, we should breathe through the nose and not with our mouth.

HOPE YOU UNDERSTAND