Study on the Histology of Digestive Tract of Cistoclemmys flavomarginatas

[Objective] The research aimed to make the histology study on the digestive system of Cistoclemmys flavomarginatas. [Method] The esophagus,stomach,small intestine and large intestine of Cistoclemmys flavomarginatas were studied by paraffin section and microphotograph technique. [Result] The tube wall of digestive tract was composed of mucous layer,submucosa,muscular layer and outer membrane. There were vertical plica,goblet cells,abundant dispersive lymphatic tissue and some isolated lymph nodule in esophagus. Esophageal gland wasn't found in esophagus. Many gastric glands were found in stomach. There were two types of gastric gland cells. The one was big cells with large karyon and the cytoplasm was addicted to alkality. The other was small cells with smaller karyon and cytoplasm was addicted to acidity. The muscular layer of stomach was specially developed. There were many villus on the surface of small intestine. The central chyle vessel was not found in villus. The villus epithelium was composed of absorptive cell and goblet cell. The intestinal gland was composed of columnar cell and few goblet cells. There were mucous membrane plica and many goblet cells in large intestine,but villus was not found in large intestine. There were many dispersive lymph nodules in large intestine. The exoteric membrane was thick in large intestine. [Conclusion] The difference of different parts of digestive tract was mainly consisted in mucous membrane and muscular layer.