The results showed that the cloacal epithelium of duck was stratified squamous epithelium.There was no goblet cell between epithelial cells, and no villus at the mucosal surface.

• 结果表明，番鸭泄殖腔上皮是复层扁平上皮，上皮间无杯状细胞，粘模表面无绒毛结构。