FIGURE 4 in Morphological study of the digestive tract of the cardinal tetra, Paracheirodon axelrodi (Characiformes: Characidae)

FIGURE 4 | Scanning Electron Microscopy (SEM) microphotographs of the digestive tract of Paracheirodon axelrodi. A-B. SEM view of mucosal surface showing a polyhedral surface of the epithelial cells in two different sections of the stomach. C. SEM view of mucosal surface of the intestine showing the brush border (Bb) present in the apical portion of the epithelium and abundant mucous secretion (red asterisk) from the GCs. D. Detail with higher magnification of C, in which the Bb is better defined.