The<unk>  is a bony structure found in many animals which serves as the general framework for the head. The<unk>  supports the structures of the face and protects the head against injury.
The<unk>  can be subdivided into two parts:  the cranium and the mandible. A<unk>  that is missing a mandible is only a cranium; this is the source of a very commonly made error in terminology. Those animals having<unk> s are called craniates.
Protection of the brain is only one part of the function of a bony<unk> . For example, a fixed distance between the eyes is essential for stereoscopic vision, and a fixed position for the ears helps the brain to use auditory cues to judge direction and distance of sounds. In some animals, the<unk>  also has a defensive function (e.g. horned ungulates); the frontal bone is where horns are mounted.
Skull
Head 
Neck
Jaw
Axial skeleton
Orbit 
Nasal bone
Chest