Fig. 6. Histology of the mucosal epithelium of digesting snakes 2 days after feeding. (A) Methacrylate-embedded section of the small intestine; Methylene Blue/Thionine stain. Scale bar, 50 µm. The mucosal epithelium is a single-layered columnar epithelium. (B) Methacrylateembedded section of the small intestine; Methylene Blue/Thionine stain. Scale bar, 25 µm. Note the large lacteals, blood-filled capillaries and lipid droplets in the enterocytes. (C) Low-power electron micrograph of enterocytes filled with lipid droplets. Scale bar, 2.5 µm. (D) High-power electron micrograph of microvilli. Scale bar, 0.5 µm.