It features a removable calvarium that is held on by small pegs and magnets with an articulating jaw. The model is also painted and numbered to show the muscle origin and insertion points for 48 muscles on the left side. Bony landmarks are present, as well as impacted wisdom teeth- a rare feature in many other skull replicas. With minimal external hardware, this model provides an uninterrupted study of the skull, which is essential for scientific education. Comes with a detailed, full-color product manual to identify the relationship between the skeletal and muscular systems.