Lymphatic tissue

A part of the body's immune system that helps protect it from bacteria and other foreign entities. Lymphatic tissue is rich in lymphocytes (and accessory cells such as macrophages and reticular cells). The lymphatic tissue includes the lymph nodes, spleen, tonsils, adenoids and the thymus (an organ in the chest that is particularly large during infancy). A tissue in medicine is not like a piece of tissue paper. It is a broad term that is applied to any group of cells that perform specific functions. A tissue in medicine need not form a layer. Thus, the bone marrow is also a tissue.

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lymphoid tissue a latticework of reticular tissue the interspaces of which contain lymphocytes; lymphoid tissue may be diffuse, or densely aggregated as in lymph nodules and nodes. See also under system.

Medical dictionary. 2011.

Look at other dictionaries:

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