A more advanced version of the standard Mr Thrifty desktop skeleton model, this hugely popular teaching and learning aid features a flexible spine with spinal cord, nerve roots, the vertebral artery, a herniated disc, cartilage, articulated joints, and removable 3-piece skull and extremities. The shoulder, wrist, hip, knee and ankle joints are moveable. The arms and legs may be removed from the skeleton but hands and feet are not articulated.