A bone in the skull that separates the nasal cavity from the brain. As such, it is located at the roof of the nose, between the two orbits. The cubical bone is lightweight due to a spongy construction. The ethmoid bone is one of the bones that makes up the orbit of the eye[WP] [ http://en.wikipedia.org/wiki/Ethmoid_bone ]

Synonyms: os ethmoidale ethmoidal bone ethmoid

This is just here as a test because I lose it

Term information


uberon_slim, pheno_slim

latin term
os ethmoidale [ FMA:TA FMA:52740 ]

depicted by


external definition

A light spongy bone located between the eye sockets, forming part of the walls and septum of the superior nasal cavity, and containing perforations for the passage of olfactory nerve fibers. [TFD][VHOG]

external ontology notes

Note the WP states the Neurocranium contains the ethmoid bone, both MA and FMA place the ethmoid as part of the viscerocranium. FMA also has it in neurocranium (via basicranium). Ideally we would have non-overlapping divisions of the skull, but for now we follow FMA

homology notes

The ethmoid region of the chondrocranium and the nasal capsules, which were largely unossified in early tetrapods and ancestral amniotes, are represented in mammals by the ethmoid and turbinates bones, respectively.[well established][VHOG]



taxon notes

todo - homology e.g. mesethmoid of teleost