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Allied Health

Lymphatic System and Immunity

What is lymph? fluid that goes between capillary blood and tissues.
What are lymph vessels? Transport excess tissue fluid back into circulatory system.
What are lymph nodes? Produces lymphocytes, filter out harmful bacteria. (has white blood cells).
What is the spleen? Produces lymphocytes and monocytes, blood reservior, recycles old red cells.
What is the thymus gland? Produces T-Lymphocytes. (located in the chest)
What is interstitial fluid? Fluid in spaces between cells.
WHat are the characteristics of lymph? Straw-colored fluid(similar to plasma;composed of H2O, no red blood cells or protein molecules(too large);carries digested food, O2, and hormones to cells ; skeletal muscle action squeezes lymph along; valves prevent backward flow.
What are the characteristics of lymph vessels? Closely parallel veins; located in almost all tissues and organs that have blood vessels; tissues lymph enters small lymph vessels which drain into larger vessels called lymphatics-the thoracic duct and right lymphatic duct;lymph flows in only one directi
What are the characteristics of lymph nodes? Tiny, oval shaped-size of pinhead to size of almond; located alone or grouped; site for lymph production and filter for screening out harmful substances; if substance cant be destroyed, node becomes inflamed.
What are tonsils? Masses of lymphatic tissue that produce lymphocytes and filter bacteria-they get smalller in size as person get older
What are adenoids? Tonsils on upper part of the throat
What is the spleen? Sac-like mass of lymohatic tissue; upper left abdominal cavity, just below diaphragm; forms lymphocytes and monocytes ; filters blood; stores large amounts of RBCs-contracts during vigorous exercise or loss of blood, to release RBCs; destroys or removes
What is the thymus gland? Upper, anterior thorax, above the heart, thymus is also considered an ebdocrine gland.
What is immunity? The body's ability to resist bacterial invasion and disease; two general types-natural and acquired
What is natural immunity? At birth, inherited and permanent,; Includes: unbroken skin; mucus and tears; blood phagocytes; local inflammation.
What is acquired immunity? Body's reaction to invaders.
What is passive acquired immunity? Acquired artificially by injecting antibodies to protect from a specific disease; immediate immunity; lasts 3-5 weeks; used when someone exposed t omeasures, tetanus, infectious hepatitis; mother provides newborn with some passive immunity.
What is active acquired immunity? Lasts longer, two types.
What is natural acquired immunity? Result of having had and recovered from a disease. For example, a child who had measles will usually not get it again- child's body has manufactured antibodies.
What is artificial immunity? Comes from being vaccinated
What is immunization? Artificial resistance to a particular infection by artifical means.
What is adenitis? Swelling in the lymph glands.
What is tonsillitis? In childhood, they may become infected, enlarged, and cause diffculty swallowing; surgery done in extreme cases.
What is lymphadenitis? Enlargement of the lymph nodes, occurs when infection is present and body is attempting to fight off the infection
What is hodgkin's disease? Cancer of the lymph nodes, painless swelling of lymph nodes is early symptom. Rx-chemothearpy and radiation.
What is infectious mononucleosis? Caused by virus; frequently in young adults and children; spread by oral contact(kissing); symptoms-enlaged lymph nodes, fever, physical and mental fatigue, increase in leukocytes. Rx-bedrest.
What is hypersensitivity? When the body's immune fails to protect itself against material, and instead, the formed irritate certain body cells; An abnormal response to a drug or allergen; an allergen is an antigen that causes allergic responses; (examples of allergens: ragweed, pe
What is anaphylaxis? Severe, sometimes fatal allergic reaction; antigen-antibody reaction stimulates a massive secretion of histamine; symptoms-breathing problems, headache, facial swelling, falling blood pressure, stomach cramps , and vomiting. Rx- adrenaline.
What is AIDS/HIV? Acquired immunodeficiency syndrome; caused by HTLV-III(human T-lymphotrophic virus type III); commonly caused by HIV or Human immunodeficiency virus; affects not only homosexual males but allpopulations; the patient with AIDS cannot fight off cancers and
What is AIDS? Most severe type of HIV infection; subject of opportunistic infections- a healthy person would fight off these infections, but a person with AIDS has a compromised immune response; symptoms of AIDS: 1.Prolonged fatigue,2.Persistent fevers or nigh sweats;
What is asymptomatic infection? Has HIV but no symptoms.
WHat is AIDS transmitted by? 1.Sex with someone who is HIV postive; 2.Sharing needles with infected IV drug users; 3.At birth from infected mother.
Created by: Netta16