Ectotherm• Animal that relies on interactions with the environment to help it control body temperatures
Amniotic egg• Egg composed of shell and membranes that create a protected environment in which the embryo can develop out of the water
Carapace• In crustaceans, the part of the exoskeleton that covers the cephalothorax ; in turtles and tortoises the dorsal part of the shell
Plastron• Ventral part if a turtle’s or tortoise’s shell.
Key Concepts• A reptile is a vertebrate that has dry, scaly skin, lungs, and terrestrial eggs with several membranes.
Key concept• Well- developed lungs; a double-loop circulatory system; a water-conserving excretory system; strong limbs; internal fertilization; and shelled, terrestrial eggs are the other adaptations that have contributed to the success of reptiles on land.
Key concept• The four surviving groups of reptiles are lizards and snakes, crocodilians, turtles, tortoises, and the tuatara.