Question

The bones of the cranium that exclusively represent single, unpaired bones are_______.

Answer 1

Unpaired bones of the cranium are the frontal, occipital, sphenoid, and ethmoid bones. These bones are fused and immobile in adults, providing protection for the brain within the skull.

Step-by-step explanation:

The bones of the cranium that exclusively represent single, unpaired bones are the frontal bone, occipital bone, sphenoid bone, and ethmoid bone. The skull consists of 22 bones in total, which include the cranial bones that form the cranial cavity encompassing the brain and serving as an attachment point for head and neck muscles.

Of these cranial bones, the frontal, occipital, sphenoid, and ethmoid bones are unpaired and developed from separate centres in the embryo and fetus. As an adult, these bones are fused with connective tissue, which means the adjoining bones do not move, rendering the skull a strong and protective structure for the brain.