南アメリカ,コロンビア,マグダレ-ナ河より採集された淡水エイPotamotrygon magdalenaeの腸管上皮細胞〔英文〕

概要

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Morphology of intestinal epithelial cells in the freshwater elasmobranch Potamotrygon magdalenae was studied by electron microscopy. Columnar cells lining the internal surface of the intestine as a single layer in P. magdalenae are characterized by microvilli densely arranged on the free surface, intermicrovillous invaginations, numerous vesicles beneath the microvilli and granules of varying sizes. These morphological characteristics suggest that columnar cells with microvilii function as absorptive cells. Interdigitations of the lateral plasma membranes, which are not found in teleosts, occur at junctions of adjacent cells in the P. magdalenae intestine. It is shown that these interdigitations exist not only in marine, but also in freshwater elasmobranchs.
日本水産學會の論文