Reptile
파충류
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<speciesfyi-glossary slug="reptile"></speciesfyi-glossary>Definition
A class of air-breathing, cold-blooded vertebrates with scaly skin, including snakes, lizards, turtles, and crocodilians.
Detailed Explanation
Reptiles colonized fully terrestrial environments by evolving the amniotic egg (with a waterproof membrane protecting the embryo), impermeable scaly skin, and efficient kidneys excreting uric acid. Their ectothermy, once considered a limitation, allows survival in hot deserts where endotherms would overheat. Crocodilians, the closest living relatives of birds, show surprising parental care — mothers guard nests and carry hatchlings to water.