The skull has flat bones (occipital parietal frontal, nasal and lacrimal) as well as the thoracic cavity (sternum and spine), and the pelvis (ilium and ischium). These bones are designed to protect internal organs, such as the brain, heart and the pelvic. They are somewhat flattened and can be used https://ricardonyipw.like-blogs.com/8521614/what-are-the-links-between-arthritis-and-bone-issues