Living things have to breathe, because they need oxygen to survive. People use their lungs to take in oxygen from the air, but fishes have organs called gills at the sides of their heads that allow them to get oxygen from the water.
Water flows in : When a fish opens its mouth, water rushes in and flows toward its gills.
Water filter : The water is pushed through bony spines inside the fish’s head called gill rakers. These clean the water and stop sand or mud from getting through.
Feathery filaments : The water then flows out of the fish’s mouth through its gills, which contain feathery strands called filaments. These filaments take the oxygen from the water and pass it into the fish’s blood.
Not all sea creatures breathe using gills. Whales are mammals with lungs and?so they must swim to the surface to breathe air. Whales draw in air and blow it out through blowholes on the top of their heads.
Answers
Abhimanyu
Living things have to breathe, because they need oxygen to survive. People use their lungs to take in oxygen from the air, but fishes have organs called gills at the sides of their heads that allow them to get oxygen from the water.
Not all sea creatures breathe using gills. Whales are mammals with lungs and?so they must swim to the surface to breathe air. Whales draw in air and blow it out through blowholes on the top of their heads.