Terrestrial animals use lungs to breathe while aquatic animals like fishes use gills to absorb dissolved oxygen in water. Frogs are organisms that can survive both in water and on land. (a) How does a frog acquire oxygen while it is underwater? (b) Are lungs of terrestrial animals and gills of fishes analogous organs? Explain why or why not. (c) Why do aquatic animals have a higher breathing rate than terrestrial animals?

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CASE_STUDIESHuman Respiratory SystemRespiration in Aquatic Organisms3 sub-questions

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