Figure 8: TEM micrograph of the stomach mucosal cells of Natrix tessellata, showing (a) numerous granules (G). (Scale bar, 2 μm). (b) vacuoles (V) and the basal position of the nucleus (N) with a prominent nucleolus (arrowhead). (Scale bar, 2 μm). (c) numerous mitochondria (M) and lysosomes (LY). (Scale bar, 2 μm).