Question

Why are fine hair and mucus present in our nostrils? Why should we not breathe in by mouth?

Answer 1

Answer:

The fine hair is present in nostrils so that it prevents the entry of dust particles into nose.

fine hair along with mucus helps us as a gate way of nose.

Trouble breathing through the nose can be caused by a virus such as the common cold or allergies. Both of these can cause swelling of the sinus lining that results in trapped mucus and reduced airflow. This can also lead to an infection of the sinuses called sinusitis.

Hope this answr helps u..

Answer 2

Explanation:

It is advisable to enhale air through nose because nose contains hair that act as a filter and hairs does not let another foreign particles to enter the nasal cavity. But if we inhale through mouth the air gets moistened but not filtered.