5. Why can't fish live on the land?
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Fish can't live on land for two main reasons One, Their breathing apparatus, Gills, Are designed for the buoying effect of total immersion. They operate by trapping oxygen and feeding it into the bloodstream.
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Gills serve the same purpose as our lungs do. Gills extract oxygen from water and send it into the fish's blood stream. For this reason, most fish, and other aquatic animals that get oxygen from water, can't survive on land very long.
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