下等動物(魚類、両棲類、爬虫類)口腔上皮の比較組織学的研究
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概要
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A comparative study has been conducted on the histology of the epithelium lining the upper wall of the mouth in a variety of vertebrates including pisces (Carassius carassius, Auguilla japonica, Parasilurus asotus), Amphibia (Rana nigromaculata, Diemyctylus, Hynobius) and Reptilia (Gekko japonicus, Takydromus tackydromoides, Natrix tigrina Clemmys japonica). The findings are summarized as follows. 1) Epithelium The oral epithelium in the Pisces was generally consisted of stratified squamous cells, whereas in the Amphibia the wall was covered either by a thin layer of stratified ciliated epithelium (Rana nigromaculata, Hynobius) or by an epithelium with marginal cuticle (Diemyctylus). In the Reptilia it was covered by a thin layer of stratified epithelium mingled in part with stratified ciliated epithelium. 2) Glands The glands in the fishes were all simple glands made of either mucous or eosinophil serous cells located scatteringly all over the epithelium, except in the case of Carassius carassius where the serous cell gland was absent. In the Amphibia the oral epithelium was provided with glands consisting of goblet cells of mucous nature and with intermaxillary and choanal glands of serous nature. The choanal glands, however, were absent in the tailed amphibians. In the Reptilia the oral epithelium, alike in the Amphibia, was distributed with scattered goblet cells, in addition to the palatal glands of serous (Gekko japonicus) and mucous (Clemmys iaponica) cells which were lacking in Takydromus tackydromus and Natrix tigrina.
- 九州歯科学会の論文