The left figure represents the natural shape of the chest, and that upon the right, the contracted state…
The ribs of the left side, with the dorsal and two lumbar vertebrae, the rib cartilages, and the sternum.
The ribs of the left side, with the dorsal and two lumbar vertebrae, the rib-cartilages and the sternum.
Front view of the bones of the thorax, including the ribs, sternum and vertebrae. Labels: 1, first bone…