Motion, bone is actually associated with, it interacts with skeletal muscle and it's the contraction of the skeletal muscle that causes the movement of our bone and which creates our voluntary motion as we know it's a motion that we can actually consciously control. So it's the interaction between our bone and the skeletal muscle, which is ultimately controlled by our nervous system, that allows us to move in any way that we wish to actually move. Now skeletal muscle does not actually attach directly to bone. Our skeletal muscle attaches to our tendons and it's the tendons that consist of collagen fibers that actually attach to our bone. Now tendons should not be confused with ligaments. Ligaments are those fibers that connect bone to other bones, but tendons are those fibers that connect our skeletal muscle to bone.