Trunk
Muscles and bones



The bones of the trunk: vertebral column, ribs, sternum, shoulder girdle and pelvis.
The rib cage consists of twelve pairs of ribs articulating posteriorly with the thoracic vertebrae; the first seven pairs join the sternum directly through costal cartilages, the next three indirectly, and the last two are floating ribs. The sternum is divided into manubrium, body and xiphoid process.