Figure 5.

The amount of glycogen in livers. (A) In Periodic acid‐Schiff stain (PAS) images, the staining area shows the glycogen in livers (black rhombuses show that hepatic glycogen homogeneously distributes in hepatocytes; black star shows the central vein; black arrow shows that the amount of hepatic glycogen in hepatocytes of smoking rats decreases and shifts away from the central vein side; black triangle shows that the glycogen deposition is increased by melatonin.). (B) The average integrated optical density (IOD) value for PAS. #P > .05 melatonin control vs normal control, *P < .05 smoking vs normal control, **P < .05 smoking+melatonin vs smoking