Vertebrate animals (vertebrates)

Vertebrate animals or vertebrates there are five groups:
1) Fish (Pisces). Pisces animals living in the water, breathing with gills, generally have scaly skin, body temperature follows the temperature of the surrounding water.
2) Animals amphibians (amphibia). Amphibious animals can live in the water or on land. Cold-blooded amphibians. Temperature according to the surrounding temperature. Adult amphibians breathe with lungs and through the skin. Immature amphibians live in water and breathe with gills.
3) Reptiles (reptiles). Reptile body is full of scales. Cold-blooded reptiles, the temperature in accordance with the surrounding environment. Reptiles breathe with lungs. Examples reptiles: lizards, worms, crocodiles, turtles, lizards, and turtles.
4) Birds (aves). Bird's body covered by fur. Warm-blooded birds. Body temperature remains even if the surrounding temperature changes.
5) Mammals (mammals). Warm-blooded mammals. Usually have two pairs of limbs and live on land. But there are also mammals that live in the sea. Mammals breathe with lungs.