斑鱾消化系统形态学与组织学研究

Morphological and histological descriptions of Girella punctata Grayy digestive system

为探究斑鱾(Girella punctata Grayy)的消化生理特性,本实验采用形态学与组织学方法对斑鱾消化系统主要器官及组织(口咽腔、食道、胃、肠及肝脏)进行研究,并分析其组织结构与功能的关系。结果显示:食道腔壁的组织结构从内到外依次为黏膜层、黏膜下层、肌层和浆膜层,这与大部分硬骨鱼类相似。胃为U型胃,主要由贲门部、胃体部和幽门部三部分组成。黏膜层和黏膜下层向胃腔突起形成8个突起皱壁,黏膜层内有丰富的腺体,消化管内壁皱褶多,肌层厚;肠道分为前肠、中肠和后肠,其比肠长约1.54±0.06,腔壁向内形成6个不规则的褶皱突起;肝脏由实质和间质两部分组成,分为左右两叶。斑鱾的消化系统结构特征与其杂食性相适应。

In order to explore the digestive physiological characteristics of Girella punctata,its main organs and tissues including oropharyngeal cavity,esophagus,stomach,intestine and liver of the digestive system were studied with morphological and histological methods.The studied included also the relationship between the organic structure and their functions.The results showed that the tissue structure of esophageal cavity wall includes mucosa layer,submucosa,muscle and serosa layers from inside to outside,similar to that of most bony fishes.The stomach is U-shaped,being mainly composed of three parts,cardia,stomach body and pylorus.Mucosal layer and submucosa protrude to the stomach cavity,forming eight protruding wrinkled walls.Mucosal layer is rich in glands,and the inner wall of digestive tract is wrinkled with a thick muscular layer.The intestine is divided into foregut,midgut and hindgut,and the ratio of intestine length to body length is 1.54±0.06.Six irregular folds and protrusions are formed inward in the cavity wall.The liver consists of parenchyma and stroma,which is divided into left and right lobes.The structural characteristics of the digestive system of G.punctata are compatible with its omnivoral behavier.