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50.4 MB (50.0 MB compressed)
5950 x 2960 pixels
50.3 x 25.1 cm ⏐ 19.8 x 9.9 in (300dpi)
DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Thymus gland tissue. Light micrograph of a transverse section through tissue from the thymus gland, part of the lymphoid system. The black areas are the thymic cortex, which produces lots of lymphocytes. The grey areas, the thymic medulla, produce less lymphocytes. In-between are blood vessels (pink). This gland is located in the mediastinum area of the chest. Its role is to produce and mature T-lymphocytes (a specialised form of white blood cell), as well as other, more basic lymphocytes. It also controls the development of lymph nodes and the spleen. Magnification: x2 when printed 10 centimetres wide.
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