| A | B |
|---|
| amniotic egg | egg that holds fluid to protect the embryo from drying out |
| ectotherms | body temperature is controlled by the animals environment (reptiles are ectotherms) |
| thick skin | a watertight layer that helps reptiles live on land |
| shell | protects the egg from damage and keeps the egg from drying out |
| albumen | provides water and protein to the embryo of a reptile |
| allantois | stores the embryo's wastes; passes oxygen to the embryo from the pores in the shell |
| yolk | gives the embryo a rich supply of food |
| amniotic sac | is filled with fluid to protect the embryo |
| turtles and tortoises | have a shell |
| crocodiles | have a narrow head and a pointed snout |
| alligators | have a broad head and a rounded snout |
| snakes and lizards | most common reptiles |
| tuataras | only found in New Zealand |
