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Immune_webct_Fall_07

Immune_webct_Fall_07 - The Immune System A network of cells...

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Unformatted text preview: The Immune System A network of cells and organs that has evolved to Can distinguish between Distinctive molecules on your body’s cells identify them as belonging to you (self). Foreign molecules carry distinctive markers that identify them as “non-self” or foreign material. Foreign cells may be from outside Infection and Immunity Antigen : • specific marker on Antibody : • specific protein produced by recognizes and destroys specific invader containing the antigen Pathogen : • organism or microbe Infection : The Body’s Defense First line of defense • Skin • Respiratory tract— • Mucous, tears, saliva, sweat, gastric juices Lymphatic System • Transport of lymph fluid (tissue fluid) • Transport of dietary fat • Development, storage, Defense– Immune cells White Blood Cells Phagocytes: • Macrophages (big eaters),dendritic cells, neutrophils, monocytes Macrophages reside Lymphocytes • T-cells : several types: destroy • B-cells : produce • Natural Killer Cells : destroy T-cells (Lymphocytes)...
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Immune_webct_Fall_07 - The Immune System A network of cells...

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