Which of the following is an unpaired facial bone?

The mandible is classified as an unpaired facial bone because it is the only bone in the face that exists as a single structure, rather than as a symmetrical pair. In human anatomy, most facial bones, such as the maxilla, nasal bones, and palatine bones, come in pairs—one on each side of the face. The mandible, also known as the lower jaw, functions independently, articulating with the temporal bone at the temporomandibular joint, which allows for movement during chewing and speaking.

This unique characteristic of being unpaired is significant in both the study of anatomy and clinical practice, as it impacts the assessment of facial injuries and surgeries. Understanding the structure and function of unpaired versus paired bones is essential for massage therapists and other healthcare professionals in addressing conditions related to facial anatomy and providing effective treatment.