1. Reptiles By Aaron Williams

2. Characteristics Cold blooded Vertebrates Their skin is covered with scales Live in all regions except for Antarctica Most of the reptiles lay eggs

3. Reptile Orders Order Chelonia, which is the turtles Order Rhynochocephalia, which is the Tuatara Order Squamata, which is the snakes and lizards Order Crocodilia, which is the alligators and crocodiles

4. Respiratory and Reproduction All reptiles use lungs to breathe Most of the reptiles reproduce sexually Some are able to reproduce asexually

6. Circulatory Most reptiles have a 3 chambered heart Crocodiles have an anatomically 4 chambered heart Some of the snakes and lizards have a 3 chambered heart that will soon later become a 4 chambered heart during contraction

7. Nervous and Excretory Reptiles have typical sense organs that are pretty well developed They have advance eye sight compared to other animals They have 12 pair of cranial nerves They excrete mainly by 2 small kidneys