1.Physical barriers -skin,mucous membranes and their secretions infection fighting chemicals,in tears,saliva,other body fluids 2.Nonspecific-Innate defenses phagocytosis-(engulfing cells) inflammatory response fever anti-microbial proteins complement,collectins,cytokines 3.Specific response Acquired Immunity -Humoral immune response -B cells,antibodies,memory cells Cellular immune response T cells,cytokines,memory cells1. Physical barriers - skin, mucous membranes and their secretions - infection fighting chemicals,in tears, saliva, other body fluids 2. Nonspecific - Innate defenses - phagocytosis - (engulfing cells) - inflammatory response - fever - anti-microbial proteins complement, collectins, cytokines 3. Specific response - Acquired Immunity - Humoral immune response - B cells, antibodies, memory cells - Cellular immune response - T cells, cytokines, memory cells