Lymphatic and immune system38.List the functions of lymphatic systemAssist in circulating body fluids (lymph)Defends body against disease-causing agentsDrains excess interstitial fluid Transports dietary lipids A, D, K, & ECarries out immune responses- highly specific39.List the organs and structures of lymphatic system.LymphLymphatic vessels (capillaries, trunks, ducts, etc.) Lymphatic organs- primary and secondary Primary- where lymphocytes develop: oThymusoRed bone marrowSecondary lymphatic organs and tissues- where lymphocytes reside: oLymph nodesoLymphatic nodulesoSpleen 40.Give definition of the following terms: immunity, self-tolerance, susceptibility, innate immunity, adaptive immunity, pathogen, infection, antigen, cellular immunity, humoral immunity, immune memory, immunocompetence.Immunity: the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells.
Self-tolerance: failure (a good thing) to attack the body’s own proteins and other antigens. If the immune system should respond to “self”, an autoimmune disease may result.Susceptibility:the state or fact of being likely or liable to be influenced or harmed by a particularthing.Innate immunity:nonspecific defense mechanisms that come into play immediately or within hours of an antigen’s appearance in the body. These mechanisms include physical barriers such as skin, chemicals in the blood, and immune system cells that attack foreign cells in the body.Adaptive immunity:protection from an infectious disease agent that is mediated by B- and T- lymphocytes following exposure to a specific antigen, and characterized by immunological memory.Pathogen:a bacterium, virus, or other microorganism that can cause disease and infection.Antigen:a toxin or other foreign substance that induces an immune response in the body, especially the production of antibodies.Cellular immunity:response that does not involve antibodies, but rather involves the activation of phagocytes, antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen. Humoral immunity:antibody-mediated beta cellularis immune system, is the aspect of immunity that is mediated by macromolecules (as opposed to cells) found in extracellular fluids such as secreted antibodies, complement proteins, and certain antimicrobial peptides. 41.List the body’s nonspecific defenses. What is their main function?Nonspecific defenses include physical and chemical barriers, the inflammatory response, and interferons. Physical barriers include the intact skin and mucous membranes. These barriers are aided by various antimicrobial chemicals in tissues and fluids. 42.What is the role of inflammation? What are the 4 cardinal signs of inflammation?