<prompt> CNS - phegocytic action withMicrogliaOligodendrocytesAstrocytesSchwann cells  <response>: A. i.e. Microglia 63 - Ganong 22nd 700-K-Sembolingum 4th 80- Ganong 23rdCentral Neuroglial cellsFunctionsASTROCYTESi. Twist around the nerve cells and form the supporting network in brain and spinal cordii. Form the BBB and thereby regulate the entry of substances from blood in to brain tissueiii. Provide Ca and K and regulate neurotransmitter level in synapsesMICROGLIAi. Engulf and destroy the micro organisms and cellular debris by means of phagocytosisii. Migrate to the injured or infected area of CNS and act as miniature macrophagesOLIGODENDROCYTES1. Forming myelin sheath2. Provide support to the CNS neuron by forming a semi-stiff connective tissue between the neuronsPeripheral neuroglial cells PNSFunctionsSCHWANN CELLS1. Provide myelination Insulation around the nerve fibres in PNS2. Important role in nerve regeneration3. Remove cellular debris during regeneration by their phagocytic activitySATELLITE CELLS1. Provide physical support to the PNS neurons2. Help in regulation of chemical environment of ECF around the PNS neurons Injection of antiserum against nerve growth factor in newborn animals leads to almost total destruction of sympathetic ganglion Immuno sympathectomy 