Neuroglia Cells Central Nervous System

There are four neuroglia cells in the central nervous system, these are the supporting cells of the central nervous system and the neurons within the central nervous system.
1. Astrocyte
Are star shaped and are the formers of the blood brain barrier, this barrier regulates what passes through and gets to the neurons in the central nervous system. They also control the release of calcium that releases the neurotransmitters from the synapse of the axon.
2. Microglial Cell
These are the smallest of the Central nervous system glial cells, they are macrophages which are phagocytes. Phagocytes are emzymes that engulf non-self foreign material.
3. Ependymal Cells
These cells are located within the body of the spine, (vertabraes). They make cerbral spinal fluid and transport. Cerbral spinal fluid is derived from blood.
4.Oligodendrocytes
They make the myelin in the central nervous system. Myelin is the fatty covering that surrounds the axons. The myelin sleath acts as an insulator and a protector of the axon. These cells can also wrap multiple axons at a time.
One can tell that it is important for these cells to exists just from reading the above. Together, they protect the central nervous system from pathogens and foreign material along with providing structural protection. Without these cells we would be very suseptible to many diseases and just normal wear and tear that happens on a daily basis. All four of theses cells are found within the Central Nervous System.