sphenoid bone
sphenoid bone A prominent, irregular, wedgeshaped bone at the base of the skull. The sphenoid bone has been called the “keystone” of the cranial floor because it is in contact with all of the other cranial bones.
sphenoid bone A prominent, irregular, wedgeshaped bone at the base of the skull. The sphenoid bone has been called the “keystone” of the cranial floor because it is in contact with all of the other cranial bones.