BIO 11 Lecture Notes - Lecture 2: Lymph Node, Reticular Connective Tissue, Immunocompetence
3 Sep 2020
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Lymphocytes: produced in red bone marrow (mature/become immunocompetent in primary lymphatic tissue) B cells finish maturing in bone marrow antibodies substances. Activated by attaching to a pathogen and producing. Receptors on the surface to allow detection of foreign. Activated by attaching to a pathogen and directly substances destroying the cell. T cells finish maturing in the thymus. Immunocompetence: gaining markers on the surface to interact w/ foreign substances. Started as a monocyte and through diapedesis became macrophages. Reticular cells: don"t attack or mark but create a stoma for the other cells to sit. Stoma: network of reticular fibers that hold the other cells in place in the lymphatic system. Macrophages attach to the fibers of the stoma. Creates a filter for the lymph fluid. Nodes=tightly packed reticular tissue in lymphatic organs. Lymph nodes the most common and the principle lymphatic organs. Cluster along blood vessels some parts of the body have more (neck, armpits, groin)
