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http://dx.doi.org/10.9710/kjm.2011.27.3.159

Ultrastructure of the Digestive Diverticulum of Saxidomus purpuratus (Bivalvia: Veneridae)  

Ju, Sun-Mi (Department of Aqualife Medicine, Chonnam National University)
Lee, Jung-Sick (Department of Aqualife Medicine, Chonnam National University)
Publication Information
The Korean Journal of Malacology / v.27, no.3, 2011 , pp. 159-165 More about this Journal
Abstract
The anatomy and ultrastructure of the digestive diverticulum of Saxidomus purpuratus were described using light and electron microscopy. The digestive diverticulum of dark green color was situated on the gonad and connected to stomach by a primary duct. Digestive diverticulum is composed of numerous digestive tubules. The epithelial layer of digestive tubule, which is simple, is composed of basophilic cells and digestive cells. Basophilic cells are columnar in shape, and the electron density is higher than that of the digestive cell. The cytoplasm has a well-developed endoplasmic reticulum, tubular mitochondria, Golgi complex and membrane-bounded granules of high electron density. Digestive cells are columnar in shape, with development of microvilli on the free surface. Pinocytic vasicles, lysosomes and numerous mitochondria were observed in the apical cytoplasm of digestive cells. The results of this study suggest that basophilic cells and digestive cells in the digestive tubule are specialized in the extracellular and intracellular digestions, respectively.
Keywords
ultrastructure; digestive diverticulum; Saxidomus purpuratus; basophilic cell; digestive cell;
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