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A&P CH14 key terms

A&P CH14 Lymphatic System and Immunity

TermDefinition
allergen a foreign substance capable of stimulating an allergic reaction
antibody a protein (immunoglobulin) that B cells of the immune system produce in response to the presence of a nonself antigen; it reacts with the antigen
antigen a chemical that stimulates cells to produce antibodies
clone a group of cells that originate from a single cell and are therefore genetically identical
complement a group of enzymes activated by the combination of antibody with antigen; enhances reaction against foreign substances within body
hapten a small molecule that combines with a larger one; forms an antigenic substance
immunity resistance to the effects of specific disease-causing agents
immunoglobulin globular plasma proteins that function as antibodies
lymph fluid that the lymphatic vessels carry
lymphatic pathway a pattern of vessels that transport lymph
lymph node a mass of lymphoid tissue
lymphocyte a type of white blood cell that provides immunity; B cell or T cell
macrophage a large phagocytic cell
pathogen a disease-causing agent
reticuloendothelial tissue a part of the immune system that consists of the phagocytic cells located in reticular connective tissue.
spleen a large organ in the upper left region of the abdomen
thymus a glandular organ in the mediastinum behind the sternum and between the lungs