Pilocated

  The  ethmoid bone  ( / ˈ ɛ θ m ɔɪ d / ; [ 1 ] [ 2 ]  from  Ancient Greek :  ἡθμός ,  romanized :  hēthmós ,  lit.   '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. Structure [ edit ] The ethmoid bone is an anterior cranial bone located between the eyes. [ 3 ]  It contributes to the medial wall of the orbit, the nasal cavity, and the nasal septum. [ 3 ]  The ethmoid has three parts:  cribriform plate ,  ethmoidal labyrinth , and  perpendicular plate . The cribriform plate forms the roof of the nasal cavity and also contributes to formation of the  anterior cranial fossa , [ 4 ]  the ethmoidal labyrinth consists of a ...