What is considered the first line of defense?, Chemokines and Cytokines, Chemical and Physical Barriers, Gram + and Gram - Bacteria, Phagocytosis, Which immune cells poke a hole in pathogens?, Dendritic cells, Natural Killing cells, B Cells, Macrophages, Which immune cells engulf and digest pathogens?, B Cells, T Cells, Macrophages, Platelets

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