| A | B |
|---|
| Reptiles | ectothermic vertebrate animals with amniotic eggs and dry skin |
| amniotic eggs | eggs protected by a shell and several membranes |
| Crocodilia | alligator, crocodile, and caiman order |
| Squamata | order of lizards and snakes |
| Chelonia | order of turtles and tortoises |
| carapace | dorsal part of a turtle's shell |
| plastron | ventral part of a turtle's shell |
| internal | type of fertilization used by most reptiles |
| Rhynchocephalia | nearly extinct order resembling prehistoric reptiles |
| pineal gland | contains cells that are sensitive to light |
| transition fossils | fossils that show animals on the amphibian-reptile borderline |
| venomous snakes | snakes that produce poison that they inject into prey |
| ovoviviparous | the egg is incubated in the mother's body |
| Triassic Period | time when a crocdiles first appeared |
| Permian Period | time at which the earth's surface cooled rapidly |
| dinosaurs | animals that share characteristics with both reptiles and birds |
| tympanum | external eardrum used by some lizards |
| Uric acid | reptiles excrete nitrogenous waste in this form |
| double-loop system | reptiles have this type of circulatory system |
| most well devoloped heart | crocodiles and alligators have this |
