Fine Structure of the Lingual Dorsal Epithelium of the Japanese Toad, Bufo japonicus (Anura: Bufonidae) : Cell Biology

概要

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The structure of the so-called "ridge-like papillae" of the lingual dorsal epithelium of the Japanese toad, Bufo japonicus was investigated by light and transmission electron microscopy. The top of each ridge-like papilla was composed of stratified columnar epithelium and its base was composed of simple columnar epithelium. The apical cells, which were located on the top of ridge-like papillae, contained a large number of mitochondria, free ribosomes and fibrous structures, and a small number of electron-dense, round granules and clear bodies. The nuclei were located in the basal part of apical cells. By contrast, cells that contained a large number of mucus granules were located at the base of the papillae. The nuclei were located in the basal part of cells. Rough-surfaced endoplasmic reticulum and Golgi apparatus were distributed in the perikaryal part of cytoplasm. Ciliated cells were also scattered at the base of the papillae. The nucleus was located in the basal region of these cells. Mitochondria and ribosomes were widely distributed in the cytoplasm. Basal bodies could be seen just beneath the free surface of the cells. In addition to these cells, a very small number of mitochondria-rich cells were located within the epithelium. Distinct, fine, cellular protrusions were distributed in a compact array on the free surface of these cells.
社団法人日本動物学会の論文
1989-08-15