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The only animal that has true lungs and gills is the lungfish. Animals like frogs often have gills for a portion of their lives and then later develop lungs.
They don't. Polar bears cannot breathe under water.
Yes, they live on land and breathe air therefore they are vertebrate and need air to breathe-lungs do that for you.
Humans use lungs only, Frogs can "breathe" through their thin moist skin, through gills, and lungs
frogs breathe through there skins. but the frog has lungs but no ribs! They don't. Frogs can hold their breath for a very long time but they still have to come to the surface to breath air.They don't, they hold their breath like we do, they can just do it a long time. During their tadpole stage, they breathe under water through their skin, using internal gills. When they mature into frogs, they develop lungs and then can only breathe air using their lungs.
Flying squirrels breathe air with lungs. They really don't fly, the actually glide using a flap of skin. They live in deciduous and coniferous forests.
Yes, birds have lungs. In fact all the homeothermals have lungs.
Fish, some crustaceans, and amphibians (only in the larval stage, e.g. tadpoles).
yes, not the same one, like the fish have gills and we have noses but all animals have a respiratory system
This description does not fit any known living animals.Reptiles are cold-blooded, breathe with lungs, usually lay eggs and have scaly skin, but they do not have scales. The only creatures with scales are fish, and they do not breathe with lungs.
Humpback whales breathe air by using their lungs. They can only breathe in when their blowhole is above the surface of the water. When they exhale, you can see a spout of warm moist air shoot upwards from their blowhole.