| 台湾泥鳅消化道的形态及组织学结构特征 |
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| 引用本文： | 刘,钊 刘,洋 郭,浪 郑学斌 冯彬彬 王红波 石叶忠 竺俊全.台湾泥鳅消化道的形态及组织学结构特征[J].宁波大学学报(理工版),2022,0(5):10-18. |
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| 作者姓名： | 刘 钊 刘 洋 郭 浪 郑学斌 冯彬彬 王红波 石叶忠 竺俊全 |
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| 作者单位： | 1.宁波大学 教育部应用海洋生物技术重点实验室, 浙江 宁波 315832; 2.新昌县养殖业技术推广中心, 浙江 绍兴 312500; 3.宁波市鄞州环亚水产养殖有限公司, 浙江 宁波 315100 |
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| 摘 要： | 为了解台湾泥鳅消化道的形态结构特点与其消化吸收功能之间的关系, 采用活体解剖、石蜡切片以及AB-PAS染色技术, 研究台湾泥鳅消化道的形态、组织学结构及黏液细胞的分布. 结果显示: 台湾泥鳅消化道由口咽腔(舌)、食道和肠道组成, 无胃; 食道粗短、肠道直、无盘曲, 肠指数0.50±0.04; 口咽腔上皮中分布有味蕾及II型和IV型黏液细胞; 食道和肠道均由黏膜层、黏膜下层、肌层及浆膜构成; 食道肌层发达, 黏膜皱襞向腔内突起, 被覆复层扁平上皮, 大量黏液细胞分布于复层上皮内, 以Ⅱ型和IV型为主, 还有少量Ⅲ型黏液细胞; 肠道各段均被覆单层柱状上皮, 上皮层内分布有3种黏液细胞, 同样以Ⅱ型和IV型为主; 肠道黏膜皱襞高度以及肌层厚度从前往后呈现下降趋势. 台湾泥鳅消化道各部的形态、组织学结构特征及黏液细胞分布特点与其功能相适应.
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| 关 键 词： | 台湾泥鳅 消化道 组织学 黏液细胞 |
Morphological and histological characteristics of digestive tract of Paramisgumus dabryanus ssp. |
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| LIU Zhao,LIU Yang,GUO Lang,ZHENG Xuebin,FENG Binbin,WANG Hongbo,SHI Yezhong,ZHU Junquan.Morphological and histological characteristics of digestive tract of Paramisgumus dabryanus ssp.[J].Journal of Ningbo University(Natural Science and Engineering Edition),2022,0(5):10-18. |
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| Authors: | LIU Zhao LIU Yang GUO Lang ZHENG Xuebin FENG Binbin WANG Hongbo SHI Yezhong ZHU Junquan |
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| Affiliation: | Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo University, Ningbo 315211, China; 2.Xinchang Aquatic Technique Popularizing Center, Shaoxing 312500, China; 3.Ningbo Yinzhou Huanya Aquaculture Co. Ltd., Ningbo 315100, China |
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| Abstract: | The current study was designed to investigate the morphological characteristics and the function of digestive tract in Paramisgumus dabryanus ssp., vivisection, paraffin section and AB-PAS staining methods were used to assess the morphological and histological structure of digestive tract and the distribution of mucous cells. The results show that the digestive tract of P. dabryanus ssp. was composed of oropharyngeal cavity (tongue), esophagus and intestines, and no stomach was found. This species were presented with a stubby esophagus and a straight intestine. The intestinal index was 0.50±0.04. In the taste buds, type II and IV mucous cells were distributed in the epithelium of oropharyngeal cavity. Both esophagus and intestine consist of mucosa, submucosa, muscular layer and serous membrane. Well-developed muscular layer was observed in the esophagus, and the mucosal plica protrudes into the lumen. The esophagus was covered with stratified squamous epithelium. A large number of mucous cells were distributed in the epithelium, which were dominated by type II and type IV mucous cells. A marginal part of type III cells were also presented. All segments of the intestinal tract were covered by single columnar epithelium. There were three kinds of mucous cells in the epithelium, which were dominated by type II and type IV mucous cells. From the front of the intestine to the back, the height of mucosal fold and the thickness of muscular layer decreased. In conclusion, the morphological and histological characteristics of the digestive tract and the distribution of mucous cells of P. dabryanus ssp. were consistent with its digestive function. |
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| Keywords: | Paramisgumus dabryanus ssp Paramisgumus dabryanus ssp digestive tract histology mucous cell |
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