So basically the oxygen and the nutrients such as our glucose that is traveling through our blood can actually get to the neuron via these astrocytes. On top of that, the astrocytes are also capable of actually providing physical support to the neurons and they maintain the nutrient and ion concentration in and around our neuron. So let's move on to the second type of glial cell in a central nervous system known as our appendomyl cell. Now, the pandemic cells are basically those cells that line the spinal cord as well as are found in certain sections of the brain. And the entire purpose of these appendyl cells is to help generate the cerebral spinal fluid. In fact, they use the cilia.