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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Phagocytosis in brain is caused by -
assistant
The correct answer is  Ans. is 'b' i.e., Microglia Microglial cells are the major phagocytic cells in C.N.S. At the time of injury microglial cells modify to form macrophages called Gitter cells.Oligodendrocytes - They secrete myelin sheath in CNSSchwann cells - The secrete myelin sheath in peripheral nervous system.