So remember, hydroxyapatite is the inorganic component of our matrix. It consists of calcium phosphate and hydroxide. So it's the collagen that gives our bone the ability to resist ten style forces. But it's the hydroxy appetite that gives the bone the ability to resist compressive forces. Now, this process of bone remodeling, so breaking down our bone and rebuilding our bone takes place during the lifetime of the organism and it also helps us rebuild our bones when we fracture those bones. So let's discuss the different steps involved in this bone metabolism, bone remodeling process.