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The fine structure of esophago gastric junction 2. study of squamo columnar cell junction in mammals


Japanese Journal of Clinical Electron Microscopy 14(1-2): 121-134
The fine structure of esophago gastric junction 2. study of squamo columnar cell junction in mammals
An EM study of the esophagogastric junction in various mammals was carried out. Observation by TEM [transmission electron microscopy] was carried out. In mammals such as the dog, cat, rabbit and mouse, there was an abrupt transition from squamous epithelium to columnar epithelium at the junction as in humans. The esophagogastric junction consisted of 3 types of squamocolumnar epithelial junction in the cat, 2 types in the dog, rabbit and mouse. Between squamous cells and columnar cells, there were desmosomes, interdigitations and, beneath the surface, junctional complexes as in humans. On observation by SEM [scanning electron microscopy] there was an abrupt transition from squamous epithelium to columnar epithelium at the esophagogastric junction as well as in human. Esophagogastric junctional line was usually straight in the dog, concave or markedly concave in the cat and rabbit and concave in the mouse. The esophagogastric junction consisted of 4 types of squamocolumnar epithelial junction in the dog and cat, 3 types in the rabbit and only 1 type in the mouse. The intrinsic characteristics of the 2 cell surfaces were maintained even at the junction. Micro-islands of squamous epithelium in the stomach were often observed at the junction.


Accession: 006677454



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