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Fig. 5
TEM micrographs of the gill apparatus in D. rerio after 96 h of exposure to 7.7 µg/L of HgCl2: (A) early degeneration in the inner layers of filaments; (B) detachment of epithelium (asterisk) and hypertrophy of chloride cell (CC); (C) high magnification of detachment in secondary epithelium (asterisk) and degeneration of PVCs (star); (D) loss of PVCs connections with the basal lamina (asterisk). All bars 2 µm.
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