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首页> 外文期刊>Zoological Science >Light and Scanning Electron Microcopy Study of the Tongue in Rhea americana
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Light and Scanning Electron Microcopy Study of the Tongue in Rhea americana

机译：美洲大黄舌苔的光和扫描电子显微镜研究

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摘要

Morphological characteristics of the tongue were studied in adult rhea (Rhea americana). The lingual surface and the surface of epithelium-connective tissue interface of rhea tongue were examined macroscopically and by light and scanning electron microscopy. The rhea tongue revealed a triangular aspect, without adjustment of the inferior bill formation, occupying approximately of the length of the oral cavity. Lingual papilla-like structures were not observed over the lingual surface. The tongue mucosa was composed of a thick non-keratinized stratified squamous epithelium in the dorsal and ventral part, supported by a connective tissue core. The submucosa contained numerous glands with cytoplasmic granules, and luminal secretion was positive for histochemical reaction to Alcian Blue in pH 2.5 and PAS, and negative to Alcian Blue in pH 0.5. Despite the rudimentary characteristic of the tongue in rhea, our results suggest an important role of tongue secretions in food lubrication and humidification during the swallowing process, based on the enormous quantity of lingual glands in the submucosa and the histochemical characteristics of their secretions.
机译：在成年丽亚（Rhea americana）中研究了舌头的形态特征。肉眼观察并通过光镜和扫描电子显微镜检查舌面和海藻舌上皮-结缔组织界面的表面。杂类动物的舌头呈三角形，未调节下颚的形成，大约占据了口腔的长度。在舌表面未观察到舌乳头状结构。舌黏膜由在结缔组织核心支撑的背侧和腹侧部分厚厚的非角化分层鳞状上皮组成。粘膜下层含有许多带有细胞质颗粒的腺体，管腔分泌物在pH 2.5和PAS下对阿辛蓝的组织化学反应呈阳性，而在pH 0.5下对阿辛蓝的组织化学反应呈阴性。尽管舌头在Rhea中具有基本的特征，但我们的研究结果表明，吞咽过程中舌头分泌物在食物润滑和加湿中起着重要作用，这是基于粘膜下层的大量舌腺及其分泌物的组织化学特征所致。

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