The ultrastructure of the gastro-endocrine cells in the gastric mucosa of the frog, Rana rugosa.
1990
Lee H.S. | Lee J.H.
The gastro-endocrine cells were examined in the fundic region of stomach of the frog, Rana rugosa, by transmission electron microscope. In the present paper, at least three kinds of cell type distributed in this region were identified according to their morphological characteristics based on the size, shape and electron density of the secretory granules. Type I cells were characterized by the presence of round or oval granules (300-500nm in diameter) with high electron density. The granules showed a wide lucent between the contents and the limiting membrane. This cell was reminiscent of the ECL cell in the human alimentary mucosa. Type II cells were characterized by the presence of spherical or oval granules (110-230nm in diameter) with low or high electron density. The granules showed a clear halo between the homogenous contents and the limiting membrane. This cell was reminiscent of the G cell in the human alimentary mucosa. Type III cells were characterized by the presence of elongated oval or pheomorphic granules (50-200nm in diameter) with low or moderate electron density and abundant microfilament bundles in the cytoplasm. The granules contained a very thin halo.
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