The bones of the skeletal system give our bodies the support they require. Learn how bone forms, the difference between spongy bone and compact bone, how to keep bones healthy, and more. Chapters focusing on the spine, hands, and skull inform readers about key bone groupings. Consideration is given to the problems that can crop up with bones, including broken bones, bone diseases, and the need for bone replacement. Color photos and diagrams illustrate the informative text.