Histological Observation of the Digestive System of Euchiloglanis kishinouyei

The morphology and histology of digestive system of Euchiloglanis kishinouyei were observed by anatomy and microscope technology in order to investigate the relationship between the histological structure of digestive system and the digestion absorption.The digestive system of E.kishinouyei was shown to be comprised of digestive tract,which was composed of five parts,buccopharyngeal cavity,oesophagus,stomach,intestine and anus,and digestive gland,which consisted of hepatopancreas and gall bladder.It was found that E.kishinouyei as a typical carnivorous fish had intestinal coefficient of 0.52±0.05.The mucosa epithelia of buccopharyngeal cavity and oesophagus were stratified squamous epithelia in which were filled with goblet cells,club-shaped cells and taste buds.The stomach was Vshaped and the mucosa epithelia were simple column epithelia without goblet cells.Abundant gestric glands were observed in the lamina propria of cardiac and fundic,while no gestric glands were found in pylorus portion.The intestine was divided into foregut,mid-gut and hindgut,the number of and the hight of mucosal flods being reduced and the thickness of muscular coats and the number of goblet cells being increased from foregut to hindgut.The liver had two lobes,in which the pancreas were dispersedly distributed as well as in the mesenterium.The gallbladder was a relatively large oval shaped.The histological structure of digestive system of E.kishinouyei was closely related with the feeding habit,digestion and absorption.