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Immune System (Lymphatic System: is a collection of organs involved in the…
Immune System
Lymphatic System: is a collection of organs involved in the production, maturation, and harboring of white blood cells called lymphocytes.
Lymphatic Vessels
lymphatic vessels form a transportation network similar in many respects to the blood vessels of the cardiovascular system.
Lymphatic Vessels contain numerous valves that keep lymph flowing in just one direction, thereby preventing backflow.
Lymphatic vessels called lacteals are present in the lining of the gastrointestinal tract, mainly in the small intestine.
Lymphatic Nodes: Are small, but organized collection of lymphoid tissue that contains many lymphocytes
Lymph nodes are located at intervals along the lymphatic vessels, and lymph passes through them on its way back to the blood.
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Lymph nodes function to remove debris and pathogens from the lymph,
Lymphatic Ducts
lymph capillaries in tissues are transported through the lymphatic vessel network to two large lymphatic ducts in the upper chest.
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Leukocytes
Leukocytes are involved in protecting the body against both infectious disease and foreign invaders.
Granular are classified by the stain best used to reveal their structure, all have obvious granules.
Neutrophils - Most common leukocyte, rapidly respond to the site of infection, love to eat (phagocytosis) bacteria.
Eosinophils Granules contain antihistamine molecules, reduce inflammation caused by basophils and mast cells.
Basophils - least common leukocyte, basophils increase inflammation and contain heparin, which hinders blood clotting.
Agranula: smaller, have less visible granules, single lobe nuclei.
Monocytes - Usually very large and spend their life wandering around and eating debris, foreign pathogens, worn out red blood cells and other worn out/damaged cells.