The ultrastructure of intracellular fat in the parenchyma of human submandibular salivary glands
Review articleOpen access

AbstractNormal human adult and foetal submandibular salivary glands have been examined by light and electron microscopy for the presence of fat in the parenchymal cells. Neutral fat globules were found in adult serous, mucous, myoepithelial, intercalary duct and striated duct cells. In adult striated duct cells lipofuscin granules were also found. The ultrastructure of these two forms of lipid is described. No fat was found in foetal glands. It is possible that the neutral fat globules are energy storage structures, but the lipofuscin granules may represent accumulations of metabolic products that can be little utilized.

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