There are flat bones inside the skull (occipital, parietal, frontal nasal, lacrimal and vomer), the thoracic cage (sternum and ribs), and the pelvis (ilium, ischium, and pubis). Flat bones guard internal organs, such as the heart, brain and organs in the pelvis. Flat bones may be somewhat smooth and serve http://cashjvdkr.blogsuperapp.com/10614153/what-is-the-relationship-between-bones-and-arthritis