And this canal contains the blood vessels, our lymph vessels that basically carry away different types of waste products. The blood vessels bring different types of nutrients and we also have neurons that basically innervate our bone. Now, bone contain many of these individual osteons. So if we actually take a small cross section of our bone, we basically get the following diagram. So, we have many of these osteons. In this case, we have 123456 of these concentric cylindrical regions we call osteons.