Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
SEM micrographs of the gill apparatus in D. rerio after 96 h of exposure to 38.5 µg/L of HgCl2: (A) degeneration of microridges in primary epithelium (arrow). Bar 20 µm; (B) wrinkled surface of primary and secondary epithelium with swelling in the distal portion of lamellae (star). Bar 20 µm; (C) increase in mucous secretion (asterisk). Bar 100 µm.
