Located in olfactory foramina in the cribriform plate of ethmoid.
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There are several paired paranasal sinuses, including the frontal, ethmoid, maxillary and sphenoid sinuses.
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The ethmoid sinuses is further subdivided into anterior and posterior ethmoid sinuses, the division of which is defined as the basal lamella of the middle turbinate.
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His description of the lacrimal ducts in the eye was a marked advance on those of his predecessors and he also gave a detailed account of the ethmoid bone and its cells in the nose.
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One of the eight bones of the cranium; a small bone filled with air spaces that forms part of the eye sockets and the nasal cavity
(Ethmoidal) The ethmoid sinus, one of the paranasal sinuses, is the collective name for the ethmoidal air cells.
Adjective, Greek ethmos = sieve, and eidos = shape or form, hence, like a sieve; an unpaired skull bone.
A median bone formed in the nasal septum between the two nasal capsules (more information). In the Anguilliformes, the premaxilla is ankylosed to the ethmoid, lateral ethmoid and vomer.