part of part of Homo sapiens sphenoid bone zone of bone organ body of sphenoid bone 2026-03-19T00:00:00Z A zone of bone organ forming the central, cuboidal portion of the sphenoid bone, located at the base of the skull between the ethmoid bone anteriorly and the basilar part of the occipital bone posteriorly; it contains the paired sphenoidal air sinuses and bears the sella turcica on its superior surface. David Osumi-Sutherland