The nasal septum comprises the septal cartilage, anteriorly, the perpendicular plate of the ethmoid bone supero-posteriorly, and the vomer infero-posteriorly. The rostrum of the sphenoid bone fits into a groove on the superior surface of the vomer (Fig. 2.5). At the base of the nasal septum is the nasal crest formed by the maxillary and palatine bones.
On either side of the upper nasal septum is a narrow space - the olfactory recess - that ends up with the horizontal portion of the cribriform plate. Posteriorly, the olfactory recess widens into the sphe-noethmoidal recess (Fig. 2.5).
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3 Physiology of the Nose and Paranasal Sinuses
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