Vitamin D, Calcium, Parathyroid Hormone, and Sex Steroids in Bone Health and Effects of Aging

Figure 1

General structure of a bone (https://commons.wikimedia.org/wiki/User:Pbroks13). Two of the most important components of the bone are the trabecular component and the cortical component. The trabecular component is the spongy part of the bone that first absorbs shock. Shock is then transferred onto cortical component.