Ethmoid bulla

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Ethmoid bulla
Gray856.png
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

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 ethmoid bulla (or ethmoidal bulla); 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.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.


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