Microstructure and ultrastructure ofdigestive organ of Pseudosciaena crocea

The histological structure of digestive tract of Pseudosciaena crocea was studied using light and electronic microscopy. The epithelium of lingual mucosa was multilayered epithelium and contained mucussecreting cells and taste buds. There were serous alveolis in menbrana propria of lingual ventral region. The oesophagus covered a multilayered epithelium and the mucous cells under the squamous cells. The stomach mucosa epithelium formed with a singlelayered columnar epithelium, a great deal number mature mucinogen granules were present in the free edge of the cells, and immature stages mucinogen granules in the around near nucleus of the cell, and the cell organs were present in circumambient and under the nucleus. There were mucous glands in the cardiac and fundic portion, and the stomach glands were present in the membrana propria enormously, and absent in the pylorus. The stomach cell shape was short taper, typical oxynticopeptic cell, in which there were tubulovesicular systems and pepsinogenic granules. The fore, mid and hind intestine epithelium was singlelayered columnar epithelium, and there were a lot of mucussecreting cells and dense microvillus in the epithelium, and the connecting complex was present in lateral edge, and abundant cell organs in the cells. The results showed that there were close correlation between the characteristic of histology structure of digestive tract and digestion and absorption of Pseudosciaena crocea.