And within these spaces we basically have the osteoblasts that secreted our extracellular matrix and eventually became our osteocides. So these purple dots are basically our osteocides. And these blue extensions are the processes, as well as our canals known as our canal liquili. So we have these blue extensions, we have our canals known as canaliculi, and we also have this center region at the center of our osteon known as a hoversion canal. Now, this hoversion canal is basically a central canal that consists of lymph vessels, it consists of blood vessels and it also consists of neurons, so, nerve cells. So, in the center of the osteon, the building block of the bone, we have a canal known as our Herbertian Canal or the central canal.