The Greater Wings of Which Bone Form a Large Portion

Question

The greater wings of which bone form a large portion of the posterior wall orbit?
A) lacrimal
B) ethmoid
C) sphenoid
D) nasal
E) zygomatic

Accepted Answer

The greater wings of the sphenoid bone form a large portion of the posterior wall of orbit. The other listed bones do not form a large portion of the posterior wall of orbit.