Reptile - Wikipedia
Reptiles, as commonly defined, are a group of tetrapods with an ectothermic ('cold-blooded') metabolism and amniotic development. Living reptiles comprise four orders: Testudines (turtles), Crocodilia (crocodilians), Squamata (lizards and snakes), and Rhynchocephalia (the tuatara).
List of reptiles - Wikipedia
Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives. The study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology.
Reptile - Simple English Wikipedia, the free encyclopedia
Reptile is the common name for one of the main groups of land vertebrates. It is not used so much by biologists, who use more accurate terms. The name "reptile" comes from Latin and means "one who creeps".
Evolution of reptiles - Wikipedia
Reptiles arose about 320 million years ago [1] during the Carboniferous period. Reptiles, in the traditional sense of the term, are defined as animals that have scales or scutes, lay land-based hard-shelled eggs, and possess ectothermic metabolisms.
Reptile | Definition, Characteristics, Examples, & Facts | Britannica
2025年1月13日 · A reptile is any member of the class Reptilia, the group of air-breathing vertebrates that have internal fertilization, amniotic development, and epidermal scales covering part or all of their body. The major groups of living reptiles are …
reptile - Kids | Britannica Kids | Homework Help
A reptile is an air-breathing animal that has scales instead of hair or feathers. Reptiles have lived on Earth for more than 280 million years. Scientists consider them to be the ancestors of birds and mammals. Over the years many kinds of reptiles have become extinct, or died out.
Reptiles – Definition, Examples, Characteristics - Science Notes …
2024年3月2日 · Reptiles are cold-blooded, scaly vertebrates that belong to the class Reptilia. They are distinguished from other vertebrates by specific physical and physiological traits. While mammals and birds are warm-blooded, reptiles rely on external sources to regulate their body temperature. Reptiles share several features with other vertebrates, such as:
reptile - Wiktionary, the free dictionary
2025年1月9日 · reptile (plural reptiles) ( strictly ) A cold-blooded vertebrate of the class Reptilia ; an amniote that is neither a synapsid nor a bird ; excludes amphibians . [from 19th c.]
15.7: Introduction to Reptiles - Biology LibreTexts
2021年2月28日 · Reptiles are tetrapod animals in the class Reptilia. This class includes today’s turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives. The study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology.
Marine reptile - Wikipedia
Marine reptiles are reptiles which have become secondarily adapted for an aquatic or semiaquatic life in a marine environment. Only about 100 of the 12,000 extant reptile species and subspecies are classed as marine reptiles, including marine iguanas, sea …