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Ch 21The Lymphatic and Immune Systems   4. Describe how lymph nodes function as lymphatic organs.   5. Describe the...

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Biology

Ch 21The Lymphatic and Immune Systems

  4. Describe how lymph nodes function as lymphaticorgans.

  5. Describe the function, recirculation, andactivation of lymphocytes.

  6. Relate the structure of lymphoid tissue to itsinfection-fighting function.

  7. Describe the locations, histological structure,and immune functions of the following lymphoid organs: thymus,lymph nodes, spleen, tonsils, aggregated lymphoid nodules in theintestine and appendix.

  8. Describe the basic characteristics of twodisorders of the lymphatic vessels: chylothorax, lymphangitis; andthree disorders of lymphocytes and lymphoid organs; mononucleosis,and Hodgkin’s lymphoma.

Answer & Explanation Solved by verified expert
3.7 Ratings (683 Votes)
4The lymphatic system is a network of tissues and organs that help rid the body of toxins waste and other unwanted materials The primary function of the lymphatic system is to transport lymph a fluid containing infectionfighting white blood cells throughout the bodyLymph nodes filter and transmit nutrients lymph fluid and waste between the bodys tissues and the bloodstream Lymphatic tissues such as the spleen tonsils and thymus contain high concentrations of white blood cells and are able to identify and destroy toxins in lymph fluid 5Lymphocytes are primarily involved in the bodys immune response mechanism This involves complex phenomena which end in the development of humoral and cellular immunity Humoral immunity involves the production of antibodies immunoglobulins and is brought about by lymphocytes which are called BcellsLymphocyte recirculation refers to the continuous transport of large numbers of nave lymphocytes between the blood and lymphatic systems Subsequently they leave these tissues and migrate continuously between the lymphoid and nonlymphoid organs using the blood vessels and lymphatic system as trafficking routesLymphocyte activation occurs when lymphocytes B cells or T cells are triggered through antigenspecific receptors on their cell surface This causes the cells to proliferate and differentiate into specialized effector lymphocytes 6The lymphatic systems travels in a relatively similar was as the circulatory system Its circulatory structure allows for the liquid that transports throughout    See Answer
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