Chapter 19 Slide

Chapter 19 Slide - BIO 205 Chapter 19 Innate Immunity An...

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BIO 205 Chapter 19
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Innate Immunity
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An Overview to Host Immune Defenses
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Blood Cells Form an Important Defense for Innate and Acquired Immunity Serum is the fluid part of blood, containing: minerals salts proteins, etc. Plasma is serum that contains clotting agents
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Leukocytes (white blood cells) are produced in the bone marrow Neutrophils (polymorphonuclear leukocytes [PMNs]) are phagocytes Eosinophophils contain toxic compounds to defend against multicellular parasites Basophils are similar to mast cells, acting in allergic reactions
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Monocytes are phagocytes that mature into macrophages in tissue Lymphocytes move to the lymph nodes after maturation Natural killer (NK) cells destroy virus-infected and abnormal cells B lymphocytes and T lymphocytes are involved in acquired immunity Dendritic cells are found in the skin and other points of pathogen origin They are involved in acquired immunity
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The Lymphatic System Is Composed of Cells and Tissues Essential to Immune Function Lymph is the clear fluid surrounding tissue cells and filling intercellular spaces The lymphatic system maintains and distributes lymphocytes
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The primary lymphoid tissues are the thymus and bone marrow The secondary lymphoid tissues are the spleen and lymph nodes The spleen contains cells that monitor and fight infectious microbes The lymph nodes contain phagocytes and lymphocytes
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Structure of a Lymph Node
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This note was uploaded on 04/17/2009 for the course MIC 201 taught by Professor Lacroix during the Spring '08 term at Rhode Island.

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Chapter 19 Slide - BIO 205 Chapter 19 Innate Immunity An...

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