Question

what is nostrils and it's use

Answer 1

The two openings in the nose care called nostrils, or napes.
The human nose can smell over 1 trillion scents, according to researchers. The nose smells with the olfactory cleft, which is the roof of the nasal cavity. 

Answer 2

Hello friend..

Here's Your Answer

The nose has two holes called nostrils. Its used to inhale air and to smell..

Hope it helped you
=KANISHKA