【摘要】 目的:探索中华大蟾蜍消化道嗜银细胞的形态与分布规律。方法:应用龙桂开浸银法对中华大赡蜍消化道各部进行石蜡包埋切片和显微观察测量。结果:嗜银细胞分布于胃贲门及以下所有消化管。胃、十二指肠与小肠末段分布密度较高。在胃主要分布于胃腺粘液细胞之间或其附近,其它部位分布于粘膜上皮和肠腺,其中十二指肠始端肠腺内有高密度分布小区。嗜银细胞常有突起,细胞形态与其所在位置有关。嗜银细胞可见向消化管腔或其周边释放嗜银颗粒的现象。结论:嗜银细胞在消化管的两端分布多而中肠少,其形态可能与其所受挤压情况有关,其体积与其分布密度呈正相关;嗜银细胞的分泌物或通过消化管腔液发挥作用,或通过旁分泌形式发挥作用。更多还原

【Abstract】 Objective: To explore the configuration and distribution of the digestive tube argentaffine cell of Bufo bufo Gargarizans. Methods: With the help of Long Guikai’ s silver staning, each part of the digestive tube of Bufo bufo Gar-garizans were routinely embedded with paraffin sectiond in series, and observed. Results; The argentaffine cells were distributed in the cardia and all the rest digestive tube below. The density was higher in ventriculus, duodenum and the end of intestinum tenue, mainly between or near the gastric gland mucous cells in ventriculus and the rest part mainly in epithelium of tunica mucosa and intestinal gland. There was also a small area of high densely distribution in the gastric gland of the duodenum. Protuberances often appeared on argentaffine cells and the configuration of the cells were related with their positions. The argentaffine cell emitted argentophile granules to digestive tube. Conclusion; More argentaffine cells are distributed at 2 ends of digestive tube, while less in the middle. Their configuration may be related to the extrusion, the volume to distributing density. The secretion of argentaffine cell is either through the liquid of digestive tube or through paracrine secretion.更多还原