False-colour TEM of a duodenal goblet cell

False-colour TEM of a duodenal goblet cell

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Caption: False-colour transmission electron micrograph of a duodenal goblet cell, a modified columnar epithelial cell responsible for the synthesis & secretion of mucus. The cell is carrot-shaped and its distended cytoplasm contains numerous mucigen granules (circular objects, top), whose contents combine with water to form mucus. The base of the cell contains an elongated nucleus (purple). The cytoplasm surrounding the nucleus is packed with rough endoplasmic reticulum (brown, linear structure) which synthesises the protein content of mucigen. The goblet cell is surrounded by absorptive epithelial cells (blue), bearing micro- villi (top). Mag: x2400 at 6x7cm, x1200 at 35mm.

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Keywords: anatomy, digestion, digestive system, duodenum, false-coloured, goblet cell, gut, human body, mucus-secreting cell, small intestine

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