air passage
air duct
airway *

Sleeping with too many pillows can stretch and narrow the air passage.

It is supposed to cure infections of the throat and the air passage.

He couldn't clear his air passage and, but for the vest, would have been helpless to remain above the surface.

A whole extra set of air passages must reside there.

This makes the air passages wider and then can breathe better than they could before.

People are wanting to leave, you know, asking about air passages.

By opening your air passages, they relieve pressure in the sinuses.

No objects go into her mouth but the air passage must be checked and clear.

A faint glimmer of light ahead showed where the air passage ended.

The child had a breathing tube inserted down his air passage and was in great pain.