Morphology and Histology of Digestive Tract in Callosciurus erythralus

The morphology and histology of digestive tract in Callosciurus erythralus were reported.The digestive tracts were divided into oral cavity,pharynx,esophagus,stomach,duodenum,jejunum,ileum,cecum,colon and rectum.They consisted of mucous membrane,submucosa,lamina muscularis and adventitia except oral cavity.There were different in mucous membrane: Epithelium consisted of stratified squamous epithetlium on esophagus and oral cavity,while simple columnar epithetlium on stomach and intestine.Muscularis mucosae was thick on esophagus,but thin on stomach,small intestine,cecum and colon.The mucosal plica,gland's distribution and thickness of muscularis were different in the different part of the digestive tract.In addition,taste buds and esophageal glands weren't observed in tongue and esophagus,respectively.These studies showed that the structure of the digestive tract in Callosciurus erythralus was adapted to feeding habits.