摘要
该研究采用解剖、石蜡切片和HE染色法对宽口裂腹鱼(Schizothorax eurystomus)消化系统解剖特征和组织切片进行观察。结果显示,其消化管管壁由内向外分别为黏膜层、黏膜下层、肌层和浆膜,主要差别在于黏膜层和肌层。食道黏膜上皮为复层扁平上皮,上皮间分布有大量杯状细胞;前肠和中肠黏膜上皮为单层柱状上皮,明显可见刷状缘、杯状细胞和淋巴细胞分布其间;后肠黏膜上皮为假复层柱状上皮,其间也有杯状细胞和淋巴细胞分布,肠道中杯状细胞由前至后逐渐增多。食道肌层为内环外纵的骨骼肌;前肠肌层为内环外纵的平滑肌;中肠和后肠为内螺旋外环行的平滑肌。消化腺由肝脏和胰腺组成,胰腺弥散状分布在肝脏中,肝小叶不明显。研究表明,宽口裂腹鱼消化系统组织学特征与其食性具有适应性。
Anatomy,paraffin section and HE staining were used to observe the anatomical characteristics and tissue slice in the digestive tract of Schizothorax eurystomus.The results show that the wall of digestive tract included mucosa,submucosa,muscularis and serosa from inner to outer.The main difference lay in mucosa and muscular layers.The mucosa layer of esophagus was covered with stratified epithelium and abundant goblet cells.The mucosae in the foregut and midgut were obviously lined by a simple columnar epithelium with abundant goblet cells,brush border and lymphocytes.The mucosa of hindgut was composed with pseudostratified columnar epithelium,goblet cells and lymphocytes.From front to back,the number of goblet cells of intestine increased gradually.The muscularis of esophagus and foregut consisted of internal-circular muscle layer and external-longitudinal muscle layer.However,the skeletal muscle and smooth muscle were distributed in muscularis of esophagus and foregut.The muscularis of midgut and hindgut consisted of internal-spiral and external-longitudinal smooth muscle layers.The digestive gland was composed of liver and pancreas,and the pancreas was diffuse in the liver.The hepatic lobule was unconspicuous.In conclusion,the histological structure of digestive system of S.eurystomus is related with its function and feeding habit.
作者
魏杰
曹希全
任永丽
艾克拜尔·热合曼
聂竹兰
WEI Jie;CAO Xiquan;REN Yongli;AIKEBAIER Rehemana;NIE Zhulan(College of Animal Science,Tarim University,Alar 843300,China)
出处
《南方水产科学》
CAS
CSCD
北大核心
2020年第1期120-126,共7页
South China Fisheries Science
基金
国家自然科学基金项目(31560721,31860729)
新疆生产建设兵团中青年科技创新领军人才计划项目(2018CB033)
华中农业大学塔里木大学科研合作联合基金项目(TDHNLH201702,2662017PY118)
关键词
宽口裂腹鱼
消化管
消化腺
组织学
Schizothorax eurystomus
Digestive tube
Digestive gland
Histology
