Which bones are included in the classification of calvarium bones?

The classification of calvarium bones specifically refers to those bones that form the upper portion of the skull, which protects the brain. The correct answer includes the frontal bone, occipital bone, and the right and left parietal bones.

The frontal bone is located at the front of the skull and forms the forehead, while the parietal bones, both right and left, make up the sides and roof of the skull. The occipital bone, at the back of the skull, contributes to the base of the cranium and supports the brain. Together, these bones create a protective dome that encases the brain.

Other choices may include bones that are not part of the calvarium, like the temporal or sphenoid bones, which play different roles in the overall structure of the skull. The temporal bones are located on the sides of the skull and house the structures of the ears, while the sphenoid bone is centrally located and contributes to the base of the skull but does not form part of the calvarium.