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Light micrographs of Danio rerio liver section after 96 h of exposure to 7.7 μg/L HgCl2. (A) General appearance of liver morphology after 96 h of exposure to 7.7 μg/L HgCl2. Bar 25 μm; (B) In the liver parenchyma lysed area (star) are visible. Bar 25 μm; (C) The cytoplasm of hepatocyte appears vacuolated. It is possible to see some occluded vessels (asterisks). Bar 10 μm. All toluidine blue.
