Esmeralda*
The system has thepossible of self and non-self-recognition. An antigenmay be a material that ignites the immune reaction. The cells complex in accepting the antigen is Lymphocytes. Once they recognize, they secrete antibodies. Antibodies are proteins that neutralize the disease-causing microorganisms. Antibodies don't directly kill pathogens, but instead, identify antigens as targets for destruction by other immune cells like phagocytes or NK cells.
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