The superior opening (meatus) is situated above the middle turbinate bone.

Local.-Attendto any disturbing cause, such as adenoids, spurs on the partition, turbinate bone, etc.

The inferior or lower turbinate bone is the largest and in a way is the only independent bone.

The middle opening (meatus) lies above the inferior turbinate bone and below the middle turbinate bone.

If it continues the throat should be examined for adenoids, enlarged turbinate bones and so on.

Air is sucked in through the nostrils and passes the three baffle-shaped turbinate bones in the upper part of the nose.