1. SKULL 2.SPINAL COLUMN 3.BONES 4.HINGE JOINT 5.BALL AND SOCKET COLUMN B A. THE INNER LAYER OF THE BONE THAT CONTAINS YELLOW WISH SUBSTANCE WHICH MANUFACTURE BLOOD CELLS IN THE BODY. B.PROTECS TGE SPINAL CORD C. A RIGID CASE THAT PROTECTS BRAIN D. ALLOWS MOVEMENT IN ALL DIRECTION E.ALLOWS MOVEMENT IN ONE DERICTON