Longitudinal differentiation of the small intestine.
D000818:Animals; D002454:Cell Differentiation; D006224:Cricetinae; D004285:Dogs; D004847:Epithelial Cells; D004848:Epithelium / Q000378:metabolism; D006168:Guinea Pigs; D006801:Humans; D007082:Ileum / Q000166:cytology; D007421:Intestine, Small / Q000166:cytology*; D007583:Jejunum / Q000166:cytology; D051381:Rats; D013194:Staining and Labeling