Human umbilical cord mesenchymal stem cells alleviated diarrhea-type irritable bowel syndrome by improving intestinal function

Figure 5 Morphology and structure of colon tissue with hematoxylin and eosin staining. Morphology and structure of colon tissue of different groups on days 14, 25, and 39. Orange arrows indicate inflammatory cell infiltration; blue arrows indicate that the ulcer has invaded the submucosa and been replaced by proliferating the connective tissue; yellow arrows indicate loose edema of the inner annular muscle and the outer longitudinal muscle. hUC-MSCs: Human umbilical cord mesenchymal stem cells; IBS-D: Diarrheal irritable bowel syndrome.