In which category would you classify the frontal bone?

The frontal bone is classified as a flat bone due to its structure and characteristics. Flat bones, like the frontal bone, typically have a thin, flattened shape and serve essential roles in protecting vital organs and providing surface area for muscle attachment. The frontal bone specifically forms the forehead and the upper part of the eye sockets, contributing to the protection of the brain and facial structures.

Flat bones are generally found in areas that require protection or support without adding bulk, which aligns with the function of the frontal bone. In contrast, irregular bones, which have complex shapes, are not applicable here as the frontal bone has a distinct flattened form. Sesamoid bones, which develop embedded within tendons and are typically small and round, do not describe the frontal bone, and long bones, characterized by their elongated shape and found in the limbs, also do not pertain to the frontal bone's categorization.