Germinal centre of lymph node follicle, light micrograph
Light micrograph showing a germinal centre (surrounded by the mantle zone) of a lymphoid secondary follicle. The germinal centre has centroblasts (several of them in mitosis), large clear macrophages and apoptotic cells (mostly at bottom centre). 0.5 micrometre thick section of plastic embedded material stained with toluidine blue., by JOSE CALVO / SCIENCE PHOTO LIBRARY
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