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首页> 外文期刊>Anais da Academia Brasileira de Ciencias >Morphological characteristics of the digestive tract of Schizodon knerii (Steindachner, 1875), (Characiformes: Anostomidae): An anatomical, histological and histochemical study
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Morphological characteristics of the digestive tract of Schizodon knerii (Steindachner, 1875), (Characiformes: Anostomidae): An anatomical, histological and histochemical study

机译：Schizodon knerii（Steindachner，1875），（Characiformes：Anostomidae）消化道的形态特征：解剖学，组织学和组织化学研究

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摘要

The digestive tracts of 44 specimens of Schizodon knerii were studied using anatomical, histological and histochemical techniques. The mouth has terminal position, the lip epithelium is squamous stratified with mucous, claviform cells and taste buds, teeth have an incisive form and the tongue has a stratified squamous epithelium with mucous cells and taste buds. The oropharynx cavity is formed by gill apparatus and pharyngeal teeth. The oesophagus presented pleated mucosa, a stratified squamous epithelium with mucous cells, oesophageal glands and taste buds. The stomach presented cardiac, fundic and pyloric regions, simple prismatic epithelium with tubular glands, with none in the pyloric region. The intestine contains 11-15 pyloric caeca, a simple prismatic epithelium with brush border, goblet cells and lymphocytes. Mucosal cells, oesophageal glands and goblet cells reacted positively to PAS, amylase + PAS, Ab pH 2.5 and Ab pH 0.5. Gastric prismatic cells reacted positively to PAS, amylase + PAS, but only those in the pyloric region reacted positively to Ab pH 2.5 and Ab pH 0.5. The results improve the understanding of the anatomy of S. knerii feeding habits and the presence of mucosubstances in the epithelium, highlights the importance of glycoproteins for passing food through the digestive tract.
机译：使用解剖学，组织学和组织化学技术研究了44个克氏裂殖酵母标本的消化道。嘴巴有末端位置，唇上皮鳞状上层有粘液，锁骨形细胞和味蕾，牙齿呈尖锐状，舌头有上层鳞状上皮，有粘液细胞和味蕾。口咽腔由g器和咽齿形成。食道表现为粘膜褶，是一种分层的鳞状上皮，具有粘液细胞，食道腺和味蕾。胃部表现为心脏，胃底和幽门区域，简单的棱柱状上皮带有管状腺体，而在幽门区域则没有。肠内含有11-15个幽门盲肠，一个简单的棱柱状上皮，带有刷状边界，杯状细胞和淋巴细胞。粘膜细胞，食道腺和杯状细胞与PAS，淀粉酶+ PAS，Ab pH 2.5和Ab pH 0.5呈阳性反应。胃棱柱形细胞对PAS，淀粉酶+ PAS呈阳性反应，但只有幽门区域的细胞对Ab pH 2.5和Ab pH 0.5呈阳性反应。结果改善了对克氏链球菌（S.knerii）喂养习惯的解剖结构和上皮中粘膜物质的了解，突出了糖蛋白对于使食物通过消化道的重要性。

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