breastbone, sternum - the flat bone that articulates with the clavicles and the first seven pairs of ribs

skull - the bony skeleton of the head of vertebrates

rib cage - the bony enclosing wall of the chest

skeletal structure - any structure created by the skeleton of an organism

endoskeleton - the internal skeleton; bony and cartilaginous structure (especially of vertebrates)

spinal column, spine, vertebral column, rachis, backbone, back - the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"