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. And the osteon consists predominantly of this matrix, the extracellular matrix that is created by osteoblast. And once we create this matrix, the osteoblasts basically differentiate into our osteocides shown by these purple regions. These osteocides basically have these extensions known as processes.