Nasal Turbinates

The Nasal Turbinates include three or sometimes four bony shelves projecting from the lateral wall of the nose. These processes are covered by mucous membrane containing large vascular spaces that can enlarge to control the caliber of the nasal cavity, facilitating heat and water exchange, and increasing the surface area of the nose.

Superior Turbinate The superior turbinate is a process of the ethmoid bone.

Superior Meatus The superior meatus is a narrow passage between the superior andmiddle nasal turbinates.

The nasal mucosa becomes swollen and inflamed (rhinitis) during upper respiratory infections and allergic reactions. Swelling of the mucosa occurs readily because of its vascularity. Infections of the nasal cavities may spread to the paranasal sinuses, lacrimal apparatus, and conjunctiva.