Labyrinth of ethmoid bone

Dr Jeremy Jones et al.

The labyrinth or lateral mass of the ethmoid bone consists of a number of thin-walled cellular cavities, the ethmoidal cells, arranged in three groups, anterior, middle, and posterior, and interposed between two vertical plates of bone; the lateral plate forms part of the orbit, the medial, part of the corresponding nasal cavity. In the disarticulated bone many of these cells are opened into, but when the bones are articulated, they are closed in at every part, except where they open into the nasal cavity.


Head and neck anatomy
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Article Information

rID: 4782
System: Head & Neck
Section: Anatomy
Tags: stub, refs, cases
Synonyms or Alternate Spellings:
  • Labyrinth of ethmoid

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    Figure 1: ethmoid bone diagrams
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