Reptile skin is covered with scutes or scales which, along with many other characteristics, distinguish reptiles from animals of other classes. Scales are made of alpha and beta-keratin and are formed from the epidermis (contrary to fish, in which the scales are formed from the dermis).
Furthermore, what are four examples of reptiles?
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.
Beside above, why do reptiles have scales?
Beneath their scales reptiles have a watertight skin that allows them to exist on dry land, unlike their amphibian counterparts. The scales also help protect reptiles from the loss of body moisture which helps them stay healthy.
What are the 3 major living groups of reptiles?
The major groups of living reptiles—the turtles (order Testudines), tuatara (order Rhynchocephalia [Sphenodontida]), lizards and snakes (order Squamata), and crocodiles (order Crocodylia, or Crocodilia)—account for over 8,700 species.
What type of lizard can run on water?