<prompt> In CNS, myelin sheath of Neurons is formed by:AstrocytesOligodendroglia cellsSchwann cellsAll the above  <response>: ANSWER B Oligodendroglia cellsREF: Basic histology, Carlos Jose, 11th edition, Chapter 9. Nerve Tissue 8c the Nervous SystemThe myelin sheath is produced by oligodendrocytes in the central nervous system and by Schwann cells in the peripheral nervous system. 