Meatuses of the nose

Meatus 

Features

Drainage 

Inferior meatus n.

Largest of all the three situated below inferior concha

Nasolacrimal duct

Middle meatus n.

Lies underneath middle concha

a) Opening of maxillary sinus at hiatus semilunaris

b) Opening of middle ethmoidal air sinus  

c) Opening of frontal sinus

Superior meatus n.

Shallow smallest of all

Opening of posterior ethmoidal air sinus