What is a Reptile?

Reptiles inhabit diverse environments and vary greatly in size. They are cold-blooded vertebrates, relying on external heat sources to regulate body temperature. Unlike mammals, reptiles can survive long periods without food. They breathe air and have a three-chambered heart, an evolutionary step between fish and mammals. Reptiles reproduce internally but lay eggs, which require stable temperatures for development. Their skin, made of beta keratin scales, allows them to thrive in dry conditions. Despite their diversity, reptiles share common features such as cold-bloodedness, egg-laying, and scaly skin.

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