ヒツジの第二胃溝に認められた腺に関する光学および電子顕微鏡的研究

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  • Light and electron microscopy on the glands observed in the reticular groove of the sheep.
  • ヒツジの第2胃溝に認められた腺に関する光学および電子顕微鏡的研究〔英文〕
  • ヒツジ ノ ダイ2 イ コウ ニ ミトメラレタ セン ニ カンスル コウガク

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Glands were observed in the reticular groove of all the sheep examined. They were compound tubulo-alveolar and seromucous glands and situated mostly in the submucosa or muscle layer of the left lip of the groove around the reticulo-omasal orifice. Their terminal portion consisted of serous and mucous cells and was surrounded by myoepithelial cells. The serous cells contained large electron-lucent vacuoles with serous granules in the peri- and supranuclear region of the cytoplasm. Myoepithelial cells were observed between the glandular cells and the basement membrane. They extended cell processes over the acinar surface and formed a network by their end-to-end junctions. These glands resembled the esophageal glands with regard to the location in the mucosa and the histological structure. They seemed to appear in juvenile animals with a high frequency. Therefore, it is considered that the area containing these glands may be related to the esophagus in the organogenesis of the forestomach in the sheep.

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