The skull is comprised of flat bones (occipital parietal frontal, lacrimal and nasal) as well as the thoracic cavity (sternum and spine), and the pelvis (ilium and ischium). The purpose of the flat bones is to safeguard internal organs like the heart, brain, and pelvic organs. The flat bones are https://ra73691.blogofoto.com/37675213/what-are-the-effects-of-arthritis-on-bones