<Li> <P> Lateral wall of nasal cavity, showing ethmoid bone in position . </P> </Li> <P> Lateral wall of nasal cavity, showing ethmoid bone in position . </P> <Li> <P> Left orbicularis oculi, seen from behind . </P> </Li> <P> Left orbicularis oculi, seen from behind . </P>

What is the purpose of the crista galli of the ethmoid bone