The Lymphatic System.docx - The Lymphatic System Tonsils...

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The Ly mphatic System Tonsils are patches of lymphatic tissue Immunity (green to identify) Lymphatic Capillaries (CAPILLARIES ARE ONE LAYER AND THIN) They absorb excess tissue fluid and return to the blood The lymphatic system is a one way high way. This system will tell you when it is fighting because you will have some sort of inflammation. Lacteals which are the capillaries in the small intestine. It works in production, maintenance and distribution of lymphocytes in the body. (What are white blood cells?)
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Red Bone Marrow it is the site of red blood cell production, kids have more why because they have more bones. Thymus sits on the heart it is a bilobed glad it is large in children and smaller in adults it is immature T lymphocytes travel to the thymus to mature. (Check out white cells) go to thymus to mature 95% stay The secondary of the lymphatic system is the lubes and the spleen Lymph nodes are small and oval shaped and they are found along lymphatic vessels and are filled with B& T cells (macrophages) They are found in the neck, armpit and the groin. Spleen Found in the upper left region of the abdominal cavity and it is filled with white pulp that has lymphocytes, & red pulp which is the result of filtered blood.
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First line of defense are physical and chemical lines of defense. Physical: barriers to entry which are skin, tears, urine, saliva mucous membrane which are in your respitory, reproductive, urinary track and the digestive Chemical : lysozyme found in tears, saliva and sweat is an acidic level of pH in the stomach and the vagina 2 nd Line of defense Inflammation There are four steps 1. Injured tissue release histamine, and cause capillaries to dilate & increase blood flow. 2. Macrophages phagocytize pathogens & release cytokines starts inflammatory response.
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3. Neutrophils & monocytes become macrophages squeeze through capillary wall and phagocytize pathogens 4. Blood clotting walls off capillary & prevents blood loss. (These activities happen all at once) Another type of second line of defense are Proteins Complement proteins which are groups of plasma proteins that attract phagocytes to pathogens and they also for membrane attack complex that makes holes in some bacteria and cusses the pathogen to burst open The second protein is the call the interferons produced by a virus infected
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cells that sent out a warning to neighboring cells. The third line of defense helps protect us against specific pathogens and it helps prevent against cancer cells and it depends on the action of B & T cells. What are B & T cells B cells produce plasma cells and memory cells Plasma cells produce specific antibodies memory cells ready to produce antibodies in the future. Antibody mediated against pathogens Produced and mature in bone marrow We need to know the general role of the B cells.
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