miniorgans that sit around lymph vessels and screen for antigens. In the cortex folllices where b-cells are activated(foucles) Paracortex-t cells are activated. Medulla -efferent and lymphatic vessels leave
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What do follicles consist of?
Mantle at the top - resting b cells and germinal centre-dividing activated b-cells.
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What is the thymus role?
bilobed at lower neck. T cells that are competent selected and release inter circulation to lymphoid organs.Cortex-immature, dividing lymphocytes screening for ones that would kill self. medulla-ready to circulation. After puberty starts to degenerat
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What is spleen role?
screens blood and in embryo makes red and white blood cells. has a fibrous capsule. red pulp-filters blood. white pulp-immune reactions, containing splenic follicles same make up as follicles in lymph nodes.
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What is MALT?
mucosa associated lymphoid tissue. they take antigens and bring it into connective tissue for screening.
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