is a specific kind of: anatomical structure, bodily structure, body structure, complex body part, structure.

is a broader term that covers: rib cage | arch | heel | girdle | column | appendicular skeleton | axial skeleton | back, backbone, rachis, spinal column, spine, vertebral column | metacarpus | metatarsus | tarsus ... show more.

is a part of: frame, skeletal system, skeleton, systema skeletale.