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lymphoid tissue

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lymphoid tissue

Cells, tissues, and organs composing the immune system, including the bone marrow, thymus, spleen, and lymph nodes. The most highly organized components are the thymus and lymph nodes, and the least organized are the cells that wander in the loose connective-tissue spaces under membranes lining most body systems, where they can establish lymph nodules (local lymphocyte production centre) in response to antigens. The most common lymphoid tissue cell is the lymphocyte. Others are macrophages, which engulf foreign materials and probably alter them to initiate the immune response, and reticular cells, which produce and maintain thin networks of fibres as a framework for most lymphoid organs. See also immunity; lymphatic system.

lymphoid tissue [′lim‚fȯid ‚tish·ü]
(histology)
lymphatic tissue


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This is the third most common cancer found in dogs and it affects white blood cells called lymphocytes and lymphoid tissue, which is found in many parts of the body including lymph nodes, spleen, intestinal tract, liver and bone marrow.
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The extent of lymphoid tissue involvement varies depending on the host and agent involved.
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