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        | network of vessels that transport body fluids and the cells and chemicals in those vessels and the organs and glands that produce them |  | 
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        | carry away excessive fluid from interstitial spaces; semilunar valves on teh inside; pass lymph nodes and merge to form lymphatic trunks |  | 
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        | trasnport fat to the circulatory system |  | 
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        | lymphatic capillaries that merge to form larger vessels the empty into the circulatory system |  | 
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        | tiny, closed ended tubes that extend into interstitial spaces |  | 
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        | drain lymph from the body; and join collecting ducts |  | 
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        | lymphatic vessels-->lymph nodes-->lymphatic trunk-->collecting ducts (thoracic or right lymphatic)-->left/right subclavian vein (respectively |  | 
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        | water and dissolved substances that leave blood capillaries by filtration and diffusion |  | 
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        | increases in tissues when smaller proteisn leak from capillaries into tissues and not returned to bloodstream during filtration |  | 
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        | hydrostatic presure of tissue fluid drives lymph into lymphatic capillaries; forces that move blood in veins (skeletal muscle contraction, breathing movements, contraction of smooth muscles in the walls of the lymph trunk)propel lymph through lymphatic vessels |  | 
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        | interferes with the flow of lymph; could happen during surgery when lymphatic vessels or tissues being removed |  | 
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        | aggregated in chains along hte larger lymphatic vessels; filter potentially harmful particles from lymph; centers of production for lymphocytes |  | 
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        | located in the interior to the aorta; divided into lobules; lymphocytes leave thymus and protect immunity |  | 
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        | posterior lateral to stomach; splenic lobules are filled with blood; contains macrophages which filter blood |  | 
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        | innate defense such as skin, mucous and hair; tears, sweat etc. wash away |  | 
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        | enzymes kill pathogens; interferons block proliferationa dn stifle tumor growth |  | 
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        | secrete perforins that destroy cancer cells |  | 
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        | attracts white blood cells adn tissues form a sac to prevent spread of pathogens |  | 
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        | monocytes give rise to macrophages; line blood vessels |  | 
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        | decrease blood-iron level and increase phagocytic activity |  | 
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