Now, the final type of cell that I'd like to mention is our osteoclasts. So if these osteoblasts basically build bone, and one way to remember osteoblast, building bone is the fact that we have a B in osteoblast. So the B stands for building. So osteocides build bones, but osteoclasts do the opposite of building. They basically resorb our bone. They break down the extracellular matrix of the bone and they secrete that into the blood.