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Ultrastructure of the Foregut Epithelial Cells in the Scarab Beetle, Allomyrina dichotoma Linne  

Yu, Chai-Hyeock (Department of Biological Sciecnes, Inha University)
Publication Information
Applied Microscopy / v.35, no.3, 2005 , pp. 177-186 More about this Journal
Abstract
The foregut epithelium of the last instar larva in the scarab beetle, Allomyrina dichotoma was observed with electron microscopes. The foregut epithelium of the scarab beetle larva is composed of a single-layered squamous absorptive cell. The luminal surface of the epithelium is covered with cuticular intima. The free surface of the squamous cell has a irregular array of microvilli 'brush border', while cell membrans close to the basal lamina are infolded and a lot of mitochondria are concentrated in those processes. The cytoplasm in the epithelial cells is well developed nucleus, mitochondria. And the basal region of cell contains large lipid-, protein droplets and numerous glycogen granules. The basal lamina is located between the basal membrane and muscle bundle, providing barrier between the epithelium and the hemolymph. The epithelium is surround by the subepithelial space and muscles. The subepithelial space, which is composed of fibrous connective tissue is innervated by many tracheoles and axon.
Keywords
Allimyrina dichotoma (Dynastidae); Epithelial cell; Foregut; Ultrastructure;
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