The skull is a bony structure found in the head of many animals. The skull supports the structures of the face and protects the head against injury. The skull can be divided into two parts: the cranium and the mandible. A skull that's missing a mandible is only a cranium; this is the source of a very commonly made error in terminology. Those animals having skulls are called craniates. Functions of the skull include protection of the brain, fixing the distance between the eyes to allow stereos… (More on Cranium)