Reptiles are air-breathing vertebrates covered in special skin made up of scales, bony plates, or a combination of both. They include crocodiles, snakes, lizards, turtles, and tor- toises.
Reptiles have dry, scaly skin like this snake. Reptiles look a lot like dinosaurs. In fact, dinosaurs were reptiles. Not all reptiles have four legs and look like a dinosaur. Some have no legs ...
Cornified scales of reptiles increased their capacity to live in terrestrial environments. The stratum corneum is very thin, with little keratin. Skin is used for gas exchange. Thick keratin layer ...