Abstract

Normal male and female mouse submaxillary glands have been studied by light and electron microscopy. The female gland is characterized by the presence of secretory granules in the intercalated duct nearest the acinus and a striated secretory tubule, i.e., a tubule with basal mitochondria similar to a striated duct but also containing secretory granules in the apical cytoplasm. The striated secretory tubule is found following the intercalated duct. The male has a very prominent secretory tubule in which two types of cells are present, one relatively clear, the other the dark cell of Pfluger. A striated secretory tubule is absent in the male. The male secretory tubule is also characterized by the presence of intracellular canaliculi.

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