There are flat bones inside the skull (occipital, parietal, frontal nasal, lacrimal and vomer), the thoracic cage (sternum and ribs), and the pelvis (ilium and ischium as well as pubis). Flat bones protect internal organs including the heart and brain. The flat bones, which are slightly flattened, protect the body http://risk17157.theobloggers.com/11640410/what-is-the-relationship-between-arthritis-and-bones