文县疣螈消化道和肝脏的形态学及组织学观察  

Morphological and Histological Observation on the Digestive Tract and Liver in Tylototriton wenxianensis

作　　者：王昱[1] 杨小录[1] 何九军[1] 崔文辉[1] 王瀚[1] 王振福[1] 

机构地区：[1]陇南师范高等专科学校生物系,甘肃成县742500

出　　处：《四川动物》2011年第2期227-230,F0002,共5页Sichuan Journal of Zoology

摘　　要：利用生物显微技术对文县疣螈的消化道和肝脏进行了观察。结果表明:文县疣螈的消化道管壁由粘膜层、粘膜下层、肌层和外膜组成。食管粘膜为复层扁平柱状上皮,胃、小肠和直肠上皮为单层柱状上皮。各段皱褶丰富。胃有发达的腺体,肠的各段无多细胞腺体分布。杯状细胞丰富,其中十二指肠最少,直肠部最多,胃的各部无杯状细胞。肝小叶分界不清,肝细胞5～8个成团或成不规则索状围绕中央静脉呈放射状排列。门管区的小叶间胆管和小叶间静脉清晰可见。表明文县疣螈消化道和肝脏的结构特征与其食性相适应。The digestive tract and liver of Tylototriton wenxianensis were observed by histological methods.Results showed that the digestive tract was made up of four concentric layers,which were the mucosa,submucosa,muscularis,and adventitia.The epithelia of the digestive tract were simple columnar cells,except those of the esophagus which were stratified squamous epithelia.Each part had plenty of mucosal plica.Plenteous glands were detected in the stomach.All segments of the intestine did not contain multicellular glands but included plenteous goblet cells.There were few goblet cells in the duodenum,but numerous goblet cells in the rectum.No goblet cells were distributed in the stomach.The boundaries of liver lobules were unclear.The conglobation was composed of five to eight pieces of hepatocytes,or the irregular hepatic cords lined into a radial alignment surrounding the central vein.Interlobular veins and interlobular bile ducts in portal areas were found clearly.The evidence indicates that the structural features of the digestive tract and liver in Tylototriton wenxianensis are adapted to its feeding habits.

关 键 词：文县疣螈 消化道 肝脏 组织结构 

分 类 号：Q954[生物学—动物学]