Lymphoid follicle

Lymphoid follicle

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Credit: CNRI/SCIENCE PHOTO LIBRARY

Caption: Lymphoid follicle. Light micrograph of a section through a lymphoid follicle in a human lymph node. The follicle is rich in immune system cells (lymphocytes) called B-cells. Each B-cell responds to a different foreign molecule (antigen). Specialised cells (follicular dendritic cells) present antigens to the B-cells. When a B-cell is exposed to its antigen, it begins to divide in the germinal centre (pale, centre). B-cells produce antibodies which protect the body against disease organisms. Tissue fluid (lymph) drains through lymph nodes on its way through the system of lymphatic vessels. Magnification: x40 at 35mm size.

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Keywords: activation, anatomy, antigen presentation, b, b-cells, cell, cells, follicular dendritic, germinal centre, healthy, histological, histology, human body, immune, immunity, immunology, light micrograph, lm, lymph node, lymphatic system, lymphocyte, lymphocytes, lymphoid follicle, normal, secondary, section, sectioned, slide, stain, stained, system, t, t-cells, white blood

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