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Goblet cells are unicellular exocrine glands. These cells secrete mucous which traps bacteria.Oligodendrocytes are found in CNS. Schwann cells are found in PNS.Swallowing is a voluntary action which is possible due to skeletal muscles.Eosinophils play an important role in allergic reactions (not involved in phagocytosis). Macrophages and neutrophils perform phagocytosis.