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Islet of Langerhans, light micrograph
High magnification light micrograph of a human pancreas, showing the difference between exocrine cells, which form rounded units (acini) with abundant serous grains in the centre, and islet endocrine cells, arranged in cords and with pale cytoplasm. Between the cords, there are connective tissue spaces with abundant blood capillaries. Although, with hematoxylin and eosin stain, a clear distinction between islet cell types is not possible, cells with a large nucleus on the periphery can be identified as alpha cells. Magnification: x360 when printed at 10 centimetres across.
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