Which two pairs of bones are classified as cranial bones, and what are the unpaired facial bones?

• A. Two frontal bones, two mandibles; one vomer, one maxilla
• B. Two parietal bones, two temporal bones; one mandible, one vomer
• C. Two temporal bones, two sphenoids; one mandible, one nasal
• D. Two occipital bones, two maxillae; one mandible, one zygomatic

Answer: (B)

Cranial bones are those that make up the protective cranium surrounding the brain, while facial bones contribute to the structure of the face. In this context, the correct pairing includes two parietal bones and two temporal bones, which are indeed classified as cranial bones. The parietal bones form the sides and roof of the skull, whereas the temporal bones are located on the sides of the skull and contain structures critical for hearing and balance.

Additionally, the unpaired facial bones that are correctly mentioned in this option are the mandible and the vomer. The mandible is the lower jawbone, and it is the only movable bone of the skull, while the vomer forms part of the nasal septum and helps divide the nasal cavity into two nostrils. Understanding the classification of these bones is essential for studying human anatomy, particularly in fields related to medicine and radiography.