And what that basically means is inside the bone we have living cells that continually undergo different types of processes. Now, one very important type of process that takes place in the bone on a continual basis throughout the lifetime of the organism is a process known as bone metabolism or or bone remodeling. Bone remodeling is the process by which specialized types of cells break down and rebuild the extracellular matrix that surrounds our cells inside the bone. Now, there are two specialized types of cells that are involved in this process of bone remodeling. We have osteoblasts and we have osteoclasts. Now, osteoblasts are those cells that build the matrix of the bone.