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Chapter 9

Anatomy and Physiology

antibody Protective protein produced by B lymphocytes in response to presence of a foreign substance called an antigen
antigen Substance recognized as harmful to the host and stimulates formation of antibodies in an immunocompetent individual
bile pigments Substances derived from the breakdown of hemoglobin, produced by the liver, and excreted in the form of bile
cytokines Chemical substances produced by certain cells that initiate, inhibit, increase, or decrease activity in other cells
extracellular fluid All body fluids found outside cells, including interstitial fluid, plasma, lymph, and cerebrospinal fluid
host Organism that maintains or harbors another organism
mmunocompetent Ability to develop an immune response, or the ability to recognize antigens and respond to them
natural killer cells Specialized lymphocytes that kill abnormal cells by releasing chemicals that destroy the cell membrane causing its intercellular fluids to leak out
Created by: Esuvill0
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