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False-colour transmission electron micrograph (TEM) featuring two elongated, acinar cells of the exocrine human pancreas. Arranged in rounded glands, these cells secrete an alkaline, enzyme rich fluid into the duodenum via the small duct (in blue) at top of image. The pancreatic secretions act to neutralise the acidic contents of the stomach as they move into the small intestine. The pyramidal-shaped cells contain a rounded nucleus (blue) with a prominent nucleoli (red). Granules of pancreatic enzyme pass through the cytoplasm towards the duct at top. Magnification: x3000 at 6x7cm size.
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