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AMPHIBIA
Vertebrata
Amphibia

These animals differ from the fish in the lack of scales, in having mucus glands in the skin, and a three-chambered heart. Respiration is through either gills or lungs. They lay eggs. These animals are found both in water and on land. Frogs, toads and salamanders are some examples (see Fig. 22).

Figure- (Diversity in Living Organisms)
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