bone is a whole of the circulatory conduct
spine is not bone. ball_and_socket_joint is joint_physical. spine is bone. frontal_bone is bone. blood_vessel is circulatory_conduit. ball_and_socket_joint is not joint_physical. cervical_spine is not bone_structure. bone is not bone_structure. blood_vessel is not circulatory_conduit. joint is not joint_physical.