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36 Cards in this Set
- Front
- Back
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tonsils
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Masses of lymph tissue in the back of the oropharynx.
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suppresor cells
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T-cell lymphocytes that inhibit the activity of B and T-cell lymphocytes.
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right lymphatic duct
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A large lymph vessel in the chest that receives lymph from the upper right part of the body.
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spleen
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An organ near the stomach that produces, stores, and eliminates blood cells.
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dendritic cells
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Antigen-presenting cells derived from monocytes.
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thoracic duct
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Large lymph vessel in the chest that receives lymph from below the diaphragm and from the left side of the body above the diaphragm; it empties the lymph into veins in the upper chest.
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T cells
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Lymphocytes formed in the thymus gland; they act directly on antigens to destroy them or produce chemicals such as interferons and interleukins that are toxic to antigens.
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thymus gland
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Organ in the mediastinum that produces T-cell lymphocytes and aids in the immune response.
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vaccination
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Introduction of altered antigens (viruses or bacteria) to produce an immune response and protection against disease.
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toxin
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A poison; a protein produced by certain bacteria, animals, and plants.
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cell-mediated immunity
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An immune response involving T-cell lymphocytes; antigens are destroyed by direct action of cells.
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plasma cell
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A cell that secretes an antibody and originates from B-cell lymphocytes.
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B cells
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Lymphocytes that transform into plasma cells and secrete antibodies.
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axillary nodes
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Lymph nodes in the armpit.
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acquired immunity
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Formation of antibodies and lymphocytes after exposure to an antigen.
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adenoids
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Masses of lymph tissue in the nasopharynx.
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antibodies
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Proteins, produced by plasma cells, that destroy antigens.
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humoral immunity
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Immune response in which B cells transform into plasma cells and secrete antibodies.
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lymph capillaries
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The tiniest lymphatic vessels.
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cervical nodes
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Lymph nodes in the neck region.
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helper cells
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T cell that aid B cells in recognizing antigens and stimulating antibody production; also called T4 cells.
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cytotoxic cells
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T-cell lymphocytes that directly kill foreign cells; also called T8 cells.
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immune response or immunity
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The body's capacity to resist all types of organisms and toxins that can damage tissue and organs.
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immunoglobulins
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Antibodies (gamma globulins that are secreted by plasma cells in humoral immunity.
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lymph
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Fluid found within lymphatic vessels and collected from tissues throughout the body.
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inguinal nodes
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Lymph nodes in the groin region.
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interleukins
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Proteins that stimulate the growth of B or T-cell lymphocytes and activate specific components of the immune response.
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interstitial fluid
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Fluid in the spaces between cells. This fluid becomes lymph when it enters lymph capillaries.
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interferons
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Antiviral proteins secreted by T cells; they also stimulate macrophages to ingest bacteria.
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macrophage
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A large phagocyte found in lymph nodes and other tissues of the body.
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lymph vessels
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Carriers of lymph throughout the body; lymph vessels empty lymph into veins in the upper part of the chest.
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lymph nodes
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Stationary lymph tissue along lymph vessels.
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natural killer (NK) cells
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Cells of lymphocyte origin that have the ability to recognize and destroy foreign cells (viruses and tumor cells) without prior sensitization.
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lymphoid organs
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Lymph nodes, spleen, and thymus gland.
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mediastinal nodes
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Lymph nodes in the area between the lungs in the thoracic (chest) cavity.
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natural immunity
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A person's own genetic ability to fight off disease.
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