Previous Figure Next Figure opening of middle ethmoidal air cells opening of posterior ethmoidal air cells opening of nasolacrimal duct Sphenoethmoidal recess Hiatus semilunaris opening of sphenoid sinus opening of anterior ethmoidal air cells Superior meatus opening of nasofrontal duct Middle meatus Maxillary sinus Inferior meatus Previous Image Next Image
Figure 33.4 The turbinates have been cut and removed to illustrate the meatus and openings into them.

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opening of nasofrontal duct

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