BIOC39H3 Lecture Notes - Lecture 3: Lymphatic Vessel, Lymph Node, Cytotoxic T Cell
8 Apr 2015
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Sites of lymphoid tissues within the human body. Major lymphoid organs: bone marrow, thymus, spleen. Less organized lymphoid tissues: adenoids, tonsils, appendix, lymph nodes, peyer"s. Patches: lines the mucosal surface of the respiratory, gastrointestinal, and urogenital tracts. Sites where lymphocytes develop and mature until they are able to respond to a pathogen. Everything else besides the bone marrow and thymus. Sites where mature lymphocytes become stimulated to respond to invading pathogens (lymph node) Dynamic tissues in which lymphocytes are constantly arriving from the blood and leaving in the lymph (a continual flux of lymphocytes) 1. 9 the structure and function of lymph node. Lie at the junctions of an anastomosing network of lymphatic vessels called the lymphatics. Lymphatics: originate in the connective tissues throughout the body, collect the plasma that continually leaks out of the blood vessels and forms the extracellular fluid (lymph)
