Which structure is NOT part of the neck?

The maxilla is a bone that forms the upper jaw and part of the orbits in the face; it is not located in the neck region. The neck primarily consists of structures that support the head and connect it to the torso, such as the cervical spine, which is a critical part of the vertebral column, and the carotid arteries, which are vital for supplying blood to the brain. The trachea, which is the windpipe that allows air to pass to the lungs, is also a key structure in the neck area. Therefore, the maxilla is distinct from these neck components, clearly categorizing it as not part of the neck structure.