What are the two fused bones that form the upper jaw known as?

The two fused bones that form the upper jaw are known as the maxillae. These bones create a significant structure in the facial skeleton, playing crucial roles in numerous functions, including the support of the upper teeth, the formation of the orbits (eye sockets), and the articulation of the nasal cavity. The maxillae are essential for proper facial structure and function, contributing to the overall shape of the face.

In contrast, the mandible refers to the lower jaw and is a single bone rather than a fusion of two. Nasal bones are small and primarily form the bridge of the nose, while temporal bones are located at the sides and base of the skull, helping to house structures of the ear and protect the brain. Understanding these distinctions is important in anatomy and recognizes the function and relevance of each bone in the facial and cranial structures.