Salivary gland

Salivary gland

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Salivary gland. Coloured scanning electron micrograph (SEM) of a transverse freeze-fractured section through an acinus (large brown circle) in a salivary gland. The rest of the image comprises several other acini surrounding this acinus. Acini are the smallest unit of a gland. They comprise a circular cluster of cells that secrete fluid into a central duct (hole, centre) that leads to larger ducts. These acini are secreting granules (lumps, brown) of mucus, the natural lubricating fluid found in saliva. Each acini is circled by a layer of connective tissue (pink). Saliva is secreted into the mouth to aid digestion and the process of swallowing. Magnification: x1000 at 6x7cm size.

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Keywords: acini, acinus, anatomy, cells, coloured, connective tissue, duct, ducts, fracture, fractured, freeze-fractured, glands, glandular, granule, granules, healthy, histology, human body, images, lumen, lumens, magnified image, microscopic photos, normal, saliva, salivary gland, scanning electron micrograph, secreting, secretion, secretory cell, section, sectioned, sem, subjects, transverse, tube, tubes

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