BIOL 221 Lecture Notes - Lecture 4: Bone Marrow, Reticular Connective Tissue, Myeloid Tissue
1 Mar 2020
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Document Summary
Tissues = unencapsulated reticular connective tissues (a&p i) Red bone marrow and malt (diffuse lymphoid tissue, nodules, tonsils) The term lymphoid tissue refers to unencapsulated reticular connective tissue that contains large numbers of lymphocytes and macrophages along the reticular fibers. Examples of lymphoid tissue include red bone marrow (hemopoietic or myeloid tissue), and tissues collectively called mucosa-associated lymphoid tissue (malt) including diffuse lymphoid tissue, lymphatic nodules, and tonsils. Lymphoid organs are encapsulated clusters for lymphoid tissue. Lymphoid organs include the lymph nodes, the spleen and the thymus. Tissues where lymphocytes reside after becoming immunocompetent. Primary lymphoid tissues and organs are places where lymphocytes are formed and become immunocompetent. Primary lymphoid tissues and organs include the red bone marrow and thymus. Secondary lymphoid tissues and organs house lymphocytes after they"ve become immunocompetent in the red bone marrow or thymus. Secondary lymphoid tissues and organs include the lymph nodes, spleen and mucosa-associated lymphoid tissue (malt).
