Study on the Histomorphology of the Digestive Tract in Silurus meridionalis
- 海洋环境－已发表论文 
应用组织学技术,对鲇形目南方鲇的消化道组织结构进行了系统的研究.结果表明,食道、胃和肠壁内突形成明显的粘膜皱褶.食道壁肌肉层极厚,并为横纹肌;胃、肠壁的肌肉层为平滑肌,胃盲囊部、幽门部的肌肉层明显比贲门部厚,肠前段的环肌层较中段厚,后段的环肌层最厚.胃腺发达,贲门部的胃腺较厚,从盲囊部下段至幽门部,胃腺逐渐减少至消失.食道近胃贲门处,贲门部和胃幽门部的粘膜下层有丰富的致密结缔组织,且有众多分支伸入肌肉层,逐渐分支变细直达肌肉细胞之间,彼此联结成网状,该结构在鱼类消化道中尚未见报道.The systematic structure of digestive tract in Silurus meridionalis has been studied by means of histology. The results show as follows: The digestive tract of silurus meridionalis has the typical feature of carnivorous fish. Significant plicamucosa have been formed in the walls of esophagus, stomach and gut. The muscularis of esophagus is special thickness and belongs to striated muscle while the muscularis of gut and stomach belong to smooth muscle. Both the muscularis of gastric blind sac and pyloric portion are thicker than those of cardiac portion. The circular muscularis of gut anterior segment is thicker than the mid's, and the posterior's which is the thickest of various segments.Gastric glands are flourishing and glands in cardiac portion are the thickest. They gradually decrease from posterior segment of blind sac to pyloric portion till dying out. There exist abundant dense connective tissue fibers in the submucosa of esophagus adjoining cardiac portion, blind sac and pyloric portion. Quantities of branching fibers extend to the muscularis and get thinner and thinner. As a result, the web has been formed. According to various materials now available, this web is originally being described in the digestive tract of fish.