Ribs, for example, are BONES located in the thoracic region of the body. They form part of the rib cage and are connected to the spine. Ribs provide protection for the organs in the chest cavity, such as the heart and lungs. They also play an important role in breathing, as they help to expand and contract the chest cavity. Ribs are made up of several different types of BONES, including the vertebrae, sternum, and costal cartilages.