The<unk>  (from Greek ethmos, "sieve") is 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.
Ethmoid bone
Mastoid process
Frontal bone
Nasal bone
Occipital bone
Spine of sphenoid bone
Lacrimal bone
Sphenoid bone