Skin barrier, mucous membrane, blood clotting are surpass, White blood cells detect foreign antigens on the pathogen, Phagocytes engulf and digest foreign pathogens, Lymphocytes produces antibodies complementary to the antigen, Antibody-atigen reaction, clumping and reducing spread of disease, Memory lymphocytes memorises the specific antibody required for antigen, Secondary response occurs when the pathogen enters again, Memory lymphocytes produce more specific antibodies quickly.

Immunity steps

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