Which among the following is NOT a cranial facial bone?

The upper arm is not classified as a craniofacial bone because the craniofacial skeleton primarily includes the bones of the skull and face. Specifically, craniofacial bones are those that make up the structure of the head, such as the nasal bones (nose), zygomatic bones (cheeks), and the mandible (jaw) which are all integral parts of the facial structure. The upper arm, on the other hand, is comprised of the humerus and is part of the appendicular skeleton rather than the axial skeleton which encompasses the skull and vertebral column. Understanding the distinction between these skeletal regions is crucial in anatomy, as it helps in identifying their respective functions and locations within the body.