page_title: Ethmoid bone
hierarchical_section_title: Ethmoid bone
context_page_description: The ethmoid bone is an unpaired bone in the skull that separates the nasal cavity from the brain. 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 make up the orbit of the eye.
context_section_description: The ethmoid bone (/ˈɛθmɔɪd/; from Greek ethmos, "sieve") is an unpaired bone in the skull that separates the nasal cavity from the brain. 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 make up the orbit of the eye.
caption: Cranial bones