
I never knew that the central nervous system was made up of so many different cells. From last semesters biology class I understood that neurons, the inter-neurons are located within the central nervous system. Surprisingly these neurons only make up about half of the volume within the CNS, so what makes up the other half? Glial cells, are the infamous cells that fill up the other half of the CNS. Everything in life needs support and protection, and that is what the glial cells provide the neurons within the CNS with. The three types of the central nervous system supporting cells are: Astrocytes, Oligodendrocytes, and Microglial cells. These glial cells have four main functions within the CNS: to hold neurons in place by surrounding them, supply oxygen and nutrients to the neurons so they can survive and perform their job, isolate one neuron from another, and destroy and remove dead neurons. As you can see if the CNS did not have these supporting cells, the neurons would not be able to perform their job; therefore, our nervous system would be encumbered. |