Ethmoid bulla

Ethmoid bulla
Lateral wall of nasal cavity; the three nasal conchæ have been removed. (Bulla ethmoidalis is labeled at center top.)
Latin	bulla ethmoidalis
Gray's	subject #223 995

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

On the lateral wall of the middle meatus is a curved fissure, the hiatus semilunaris, limited below by the edge of the uncinate process of the ethmoid and above by an elevation named the bulla ethmoidalis; the middle ethmoidal cells are contained within this bulla and open on or near to it.

The bulla ethmoidalis is caused by the bulging of the middle ethmoidal cells which open on or immediately above it, and the size of the bulla varies with that of its contained cells.

External links

• SUNY Labs 22:os-1115
• PMID 11771046 ("The bulla ethmoidalis: lamella or a true cell?")

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

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