The Lymphatic System and Immunit1

The Lymphatic System and Immunit1 - The Lymphatic System...

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The Lymphatic System and Immunity Chemical Mediators o Chemical mediators kill microorganisms, promote phagocytosis, and increase inflammation. o Lysozyme in tears and complement in plasma are examples of chemicals involved in innate immunity. o Interferons prevent the replication of viruses. Cells o Chemotaxis is the ability of cells to move toward microorganisms or sites of tissue damage. o Neutrophils are the first phagocytic cells to respond to microorganisms. o Macrophages are large phagocytic cells that are active in the latter part of an infection. Macrophages are also positioned at sites of potential entry of microorganisms into tissues. o Basophils and mast cells promote inflammation, whereas eosinophils inhibit inflammation. o Natural killer cells lyse tumor cells and virus-infected cells. Inflammatory Response o Chemical mediators cause vasodilation and increase vascular o permeability, allowing the entry of chemicals into damaged tissues.
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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The Lymphatic System and Immunit1 - The Lymphatic System...

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