Figure 4: The constituent of the epithelium of posterior intestine: (A) Numerous enteroendocrine cells (arrow) are present among theenterocytes. (Grimelius silver stain). (B) Semithin section of simple columnar epithelium of the posterior intestineof grass carp showing positive reaction of goblet cells (gc). (C) Notice the presence of large number of vesicles (arrows) and cell proliferation (*) in the basal part of the epithelium. (Toluidine blue).