Final answer:
The non-paired cranial bones include the frontal bone, occipital bone, sphenoid bone, and ethmoid bone. These bones are part of the cranium that protects the brain and provide structure to the face. They are immobile and tightly fused in adult skulls.
Step-by-step explanation:
List of Non-Paired Cranial Bones
The cranium, also known as the braincase, includes several bones that protect the brain and give structure to the face. In terms of the non-paired cranial bones, they comprise the following:
- Frontal bone - This bone forms the forehead and the upper part of the eye sockets (orbits).
- Occipital bone - Located at the back and base of the skull, it contains the foramen magnum, through which the spinal cord connects to the brain.
- Sphenoid bone - Contributing to the eye sockets, it is a complex bone located at the base of the skull, in front of the temporals and basilar part of the occipital bone.
- Ethmoid bone - It separates the nasal cavity from the brain and is also a part of the nasal septum and the walls of the orbits.
These bones are tightly fused with connective tissue in adults, making them immobile and providing a solid protection for the brain.