Define These Lymphatic And Immune System Vocabulary Flashcards

acquired immunity Formation of antibodies and lymphocytes after exposure to an antigen adenoids Masses of lymphatic tissue in the nasopharynx antibody Protein produced by B cell lymphocytes to destroy antigens antigen Substance that the body recognizes as foreign; evokes an immune response. axillary node Any of the 20 to 30 lymph nodes in the armpit. B cell Lymphocyte that originates in the bone marrow and transforms into a plasma cell to secrete antibodies. cell-mediated immunity An immune response involving T lymphocytes; antigens are destroyed by direct action of cells, as opposed to be antibodies. cervical node One of many lymph nodes in the neck region. cytokine Protein (made by T lymphocytes) that aids antigen destruction. cytotoxic T cell T lymphocyte that directly kills foreign cells. dendritic cell Cell (specialized macrophage) that ingests antigens and presents them to T cells. helper T cell Lymphocyte that aids B cells in recornizing antigens and stimulating antibody production; also called T4 cell or CD4+ cell humoral immunity Immune response in which B cells transform into plasma cells and secrete antibodies. immune response Body's capacity to resist foreign organisms and toxins that can damage tissue and organs; humoral and cell-mediated immunity. immunoglobulins Antibodies (gamma globulins) such as IgA, IgE, IgC, IgM and IgD that are secreted by plasma cells in humoral immunity. immunotherapy Use of immunologic knowledge and techniques to treat or prevent disease. inguinal node One of several lymph nodes in the groin region. interferons Antiviral proteins (cytokines) secreted by T cells; they are also stimulated macrophages to ingest bacteria. interleukins Proteins (cytokines) that stimulate the growth of B or T lymphocytes and activate specific components of the immune response. interstitial fluid Fluid in the spaces between cells. This fluid becomes lymph when it enters lymph capillaries. killer T cell Cytotoxic T cell lymphocyte that recognizes and destroys foreign cells (viruses and tumor cells). lymph Thin, watery fluid found within lymphatic vessels and collected from tissues throughout the body. lymph capillaries Tiniest lymphatic vessels. lymphoid organs Lymph nodes, spleen and thymus gland lymph node Stationary soild lymphatic tissue along lymph vessels. lymph vessel Carrier of lymph throughout the body; lymphatic vessels empty lymph into veins in the upper part of the chest. macrophage Large phagocyte found in lymph nodes and other tissues of the body. mediastinal node Any of may lymph nodes in the area between the lungs in the thoracic cavity. monoclonal antibody Antibody produced in a laboratory to attack antigens. natural immunity An individual's own genetic ability to fight off disease. plasma cell Lymphoid cell that secretes an antibody and originates from B lymphocytes. right lymphatic duct Large lymphatic vessel in the chest that receives lymph from the upper right part of the body. spleen Organ near the stomach that produces, stores, and eliminates blood cells. suppressor T cell Lymphocyte that inhibits the activity of B and T lymphocytes. T cell Lymphocyte that originates the bone marrow but matures in the thymus gland. tolerance In the thymus, T lymphocytes learn to recognize and accept the body's own antigens as "self" or friendly. thoracic duct Large lymphatic vessel in the chest that receives lymph from below the diaphragm and from the left side of the body above the diaphragm. thymus gland Organ in the mediastinum that produces T lymphocytes and aids in the immune response. tonsils Masses of lymphatic tissue in the back of the oropharynx. toxin Poison; a protein produced by certain bacteria, animals, or plants. vaccination Introduction of altered antigens (viruses or bacteria) to produce an immune respoinse and protection against disease. vaccine Weakened or killed miroorganisms or toxins administered to induce immunity to infection or disease.