1) Covered by a vascular mucous membrane lined with small hairs and mucous secretions.

2) Is divided by the septum into 2 anterior cavities (the vestibules).

3) Sensory endings of the olfactory nerve lie on the roof of the nose.

4) The lateral walls of the nose are formed by turbinates.

5) The maxillary sinuses lie along the lateral wall of the nose cavity.

6) The frontal sinuses are in the frontal bone superior to the nasal cavities.

7) The ethmoid sinuses lie behind the frontal sinuses.

8) The sphenoid sinuses are deep in the skuill behind the ethmoid sinuses.

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