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Chapter 14

Vocabulary - Lymphatic and Immune Systems

Adaptive immunity: The ability to recognize and remember specific antigens and mailed in attack on them. Humoral (B cells) and cell – mediated immunity (T cells) are examples.
Adenoids: Mass of lymphatic tissue in the nasopharynx.
Antibody: Protein produced by B cells to destroy antigens.
Antigen: Substance that the body recognizes as foreign; invokes an immune response.
Auxiliary nodes: Lymph nodes in the armpits (underarms).
B cell (B lymphocyte): Lymphocytes that matures into a plasma cell to create antibodies.
Cell-mediated immunity T cells (cytotoxic, helper and suppressor) that respond to antigens and destroy them; a type of adaptive immunity.
Cervical nodes: Lymph nodes in the neck region.
Complement system: Proteins in the blood that help antibodies kill their target
Cytokines: Protein secreted by the cytotoxic T cells to aid in antigen destruction.
Cytotoxic T cells: Lymphocyte that directly kills antigens; called CD8 – positive T cell.
Dendrite cell: Antigen – presenting cell. Shows T and B cells what to attack.
Helper T cell: Lymph lymphocytes that aids B cells and stimulate T cells. Also called CD4 – positive T cell.
Humoral immunity: These cells produce antibodies after exposure to specific antigens; type of adaptive immunity.
Immunity: Body's ability to resist foreign organisms and toxins that damaged tissues and organs. This includes natural immunity and adaptive immunity.
Immunoglobulins: IgA, IGE, IgG, IgE M, and IgD, secreted by plasma cells (mature B cells) in response to the presence of an antigen.
Immunotherapy: Use of immature cells, antibodies, or vaccines to treat or prevent disease.
Inguinal nodes: Lymph nodes in groin region.
Interferons: Proteins (cytokines) secreted by T cells and other cells to aid and regulate the immune response.
Interleukins: Fluid in the spaces between cells. This fluid becomes limb when it enters lymph capillaries.
Lymph: Then, watery fluid found within lymphatic vessels and collected from tissues throughout the body.
Lymph capillaries: Thinnest lymphatic vessels.
Lymphoid organs: Lymph nodes, spleen, and thymus gland.
Lymph node: Collection of stationary solid lymphatic tissue along lymph vessels; contains cells (lymphocytes and macrophages) that fight infection.
Lymph vessel: Carrier of lymph throughout the body; lymphatic vessels and the limb into veins in the upper part of the chest.
Macrophage: Large phagocyte found in lymph nodes and other tissues of the body. Phag/o means to swallow.
Mediastinal nodes: Lymph nodes in the area between the lungs and the thoracic (chest) cavity.
Mesenteric nodes: Lymph nodes in the mesentery (intestinal region).
Monoclonal antibody: Antibody produced in a laboratory to attack antigens and to destroy cells; useful in immunotherapy.
Natural immunity: Protection that an individual is born with to fight infections such as neutrophils, monocytes, macrophages, and NK cells. It is not antigen specific and does not elicit memory.
Paraaortic nodes: Lymph nodes near the aorta in the lumbar, waste, area of the body.
Plasma cell: Lymphocytes that secrete antibodies. It matures from be lymphocytes.
Right lymphatic duct: Lymphatic vessels in the chest that dreams lymph from the upper right part of the body. It empties limped into a large vein on the neck.
Spleen: Organ the upper quadrant of the abdomen that destroys worn-out red blood cells, activates lymphocytes in stores blood.
Suppressor T cell: Lymphocytes that inhibits the activity of B and T cells. Also called a Treg (regulatory T-cell).
T cell (T lymphocyte): Lymphocytes that acts directly on antigens to destroy them or produce chemicals (cytokines) such as interferons and interleukins that are toxic to antigens.
Tolerance: The ability of T lymphocytes to recognize and accept the body's own antigens as "self"or friendly. Once tolerance is established, the immune system will not react against the body.
Thoracic duct: Large lymphatic vessel that drains lymph from the lower and left side of the body (head, neck, arm, and chest) it empties slam into large veins in the neck
Thymus gland: Lymphoid organ in the mediastinum that conditions T cells to react foreign cells and aid in the immune response.
Tonsils: Masses of lymphatic tissue in the back of the oropharynx.
Toxin: Poison, a protein produced by certain bacterial, animals, or plants.
Vaccination: Closure of an individual to a foreign protein (antigen) that provokes an immune response. Response will destroy any cell the processes the antigen on its surface and protect against infection
Vaccine: Weakened or killed microorganisms, toxins or other proteins given to induce immunity to an infection or disease.
Created by: Bowiegirl



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