The Axis Scientific 22-part Osteopathic Natural Bone Human Skull Model is an effective tool for teaching and learning the complex anatomy of the human skull. The human skull consists of many individual bones that gradually grow together along with a human s development. This new Axis Scientific Model is created from a natural cast of a human skull. The complex anatomical structure of the human skull easy to understand and visualize when it is disassembled into its 22 individual bones. Axis Scientific 22 Part Osteopathic Natural Bone Human Skull is a natural version that depicts all the bones without the individual or paired bones being colored coded. The individual bones are securely held together by small plastic pegs that are easy to assemble and disassemble. The jaw is held in place with magnets.