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chapt 13

lymphatic and immune system/ definitions

QuestionAnswer
lymph Fluid that contains white blood cells and other substances and flows in the lymphatic vessels.
lymphatic pathways Vessels that transport lymph around the body.
lymphatic vessels Contain valves that prevent backflow of lymph. As the vessels approach the heart, they carry more fluid and are larger in size.
lymph nodes Specialized organ that filters harmful substances from the tissues and assists in the immune response
spleen Organ of lymph system that filters and stores blood, removes old red blood cells, and activates lymphocytes.
thymus gland Soft gland with two lobes that is involved in immune responses; located in mediastinum; gland that is part of the immune system as well as part of the endocrine system; aids in the maturation of T and B cells.
T cells Specialized white blood cells that receive markers in the thymus, are responsible for cellular immunity, and assist with humoral immunity.
T lymphocytes Specialized white blood cells that receive markers in the thymus, are responsible for cellular immunity, and assist with humoral immunity.
B lymphocytes kind of lymphocyte that manufactures antibodies.
B cells A kind of lymphocyte that manufactures antibodies.
thymosin Hormone secreted by the thymus gland that aids in distribution of thymocytes and lymphocytes.
macrophage Special cell that devours foreign substances.
microphage Small phagocytic cell that devours foreign substances
phagocytosis Ingestion of foreign substances by specialized cells.
antibody Specialized protein that fights disease; also called immunoglobulin.
pathogen Disease-causing agent.
antigen Any substance that can provoke an immune response.
immunity Resistance to particular pathogens.
natural immunity Inherent resistance to disease found in a species, race, family group, or certain individuals.
acquired active immunity Resistance to a disease acquired naturally or developed by previous exposure or vaccination.
immunization Injection of an antigen from a different organism to cause active immunity; vaccination.
vaccination Injection of an antigen from a different organism to cause active immunity.
antigen Any substance that can provoke an immune response.
vaccine Antigen developed from a different organism that causes active immunity in the recipient.
humoral immunity Resistance to disease provided by plasma cells and antibody production.
plasma Specialized lymphocyte that produces immunoglobulins.
immunoglobulin Antibody.
cell-mediated immunity Resistance to disease mediated by T cells.
interferon Protein produced by T cells and other cells; destroys disease-causing cells with its antiviral properties.
interleukin Protein produced by T cells; helps regulate immune system.
cytotoxic cytotoxic
suppressor cell T cell that suppresses B cells and other immune cells.
acquired passive immunity Inoculation against disease or poison; using antitoxins or antibodies from or in another person or another species.
antitoxin Antibodies directed against a particular disease or poison.
gamma globulin 1. Globulin that arises in lymphatic tissue and functions as part of the immune system. 2. Antibodies given to prevent or lessen certain diseases.
Created by: Edunham
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