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Amphibians. Amphibians are a class of cold-blooded vertebrates made up of frogs, toads, salamanders, newts, and caecilians (wormlike animals with poorly developed eyes). All amphibians spend part of their lives in water and part on land, which is how they earned their name—“amphibian” comes from a Greek word meaning “double life.”.
Amphibian - Evolution, Classification, Adaptation: Appearing during the Middle Mississippian Epoch, amphibians likely descended from aquatic tetrapods which had lungs and appendages with internal skeletal support. The transition to terrestrial life included a stronger skeleton to counter the full effect of gravity, and changes to skin, feeding structures, and sense organs.
28 de oct. de 2022 · There are three types of amphibians – anura, apoda, and urodela. Anura: Also called Salientia, this group primarily includes toads and frogs, making them one of the most significant orders of the class. Apoda: As the least familiar of orders, this group of amphibians primarily covers caecilians, which live in the ground and streams.
Amphibian Ectothermy. Amphibians are ectothermic, so their internal body temperature is generally about the same as the temperature of their environment.When it’s cold outside, their body temperature drops, and they become very sluggish. When the outside temperature rises, so does their body temperature, and they are much more active.
Amphibians. Did you know the first amphibians evolved from fish 370 million years ago? These creatures were the first vertebrates to move from marine to land habitats. Discover the history and classification of amphibians such as frogs, salamanders, and more.
Amphibians are vertebrates (animals with backbones) who were actually the first four-limbed vertebrates to walk the Earth. They are cold-blooded, with their body temperature being regulated by their surrounding temperature. They spend part of their lives in water and part on land, which is how they earned their name of “amphibian”, from the Greek word meaning “double life”.
amphibian翻译：两栖动物, 水陆两用飞机|水陆两用车。了解更多。
