Answer: Let me know if this helps
1. Gill filaments absorb oxygen from water and release carbon dioxide
2. Water is swallowed by the mouth and pumped to the gills
3. Water is pumped out behind the opreculum, or gill cover
Step-by-step explanation:
Gills take oxygen out of the water and let water carry away carbon dioxide. Fish force water through their gills, where it flows past lots of tiny blood vessels. Oxygen seeps through the walls of those vessels into the blood, and carbon dioxide seeps out.