And at the center of each osteon we have our central canal known as the Herbertian canal. And within this her version canal, we basically have the blood vessels, lymph vessels and our nerve cells, our nerve fibers. Now, what about the connecting regions between these hiversion canals? So, the Herversion canal of one asteon is connected to the hererson canal of a different adjacent osteon via a canal known as our Volkmans canal. So the volcano canal is basically our canal that bridges that connects adjacent harvesting canals as shown in the following cross sectional diagram. So once again, the building unit of our bone is known as an osteon.