Cleans the air.

NasalMucosa

T
he naris vestibule is lined with hairs
that trap some large dust particles from air.
Septum and conchae increase the surface
area and give airflow turbulence,
increasing the odds that air will contact
the mucous membrane of the nasal tract,
ciliated epithelial columns
with mucous secreted by the goblets.
The mucous layer traps the air debris,
and cilia sweeps it posteriorly
to the pharynx then the esophagus
then ridded by the rest of the tube in us.

*[ WSB ].