1. Reptiles

2. Therapsids mammal-like reptiles considered to be ancestors of mammals

3. Characteristics of Reptiles
Thick, dry skin
Breathe with lungs
Ectotherms
Lay an amniotic egg
Reproduce by internal fertilization

4. The amniotic egg first evolved in reptiles
Reptiles are adapted to life on land because of they
have an amniotic egg.

5. Parts of an egg Amnion Amniotic Fluid Alantois Albumen Yolk sac
Egg shell
H. Embryo
K. Air space

6. Shell Protects egg Keeps it from drying out
Has small pores that allow oxygen to pass through to the growing embryo and allows carbon dioxide to leave

7. Albumen
Provides water and protein to the embryo

8. Amniotic sac Filled with fluid Surrounds the embryo
The amniotic fluid protects it from injury
Where the reptilian embryo develops

9. Yolk
Provides a rich supply of food to the
embryo

10. Allantois Stores waste from the embryo
Also passes oxygen to the embryo from the pores in the shell

11. Because reptiles produce amniotic eggs, they can only reproduce by internal fertilization.

12. Female sea turtles come ashore only to lay their eggs.

13. Types of Reptiles Turtles Tortoises Crocodiles Alligators Lizards
Snakes
Tuataras

14. Tuatara Lives in New Zealand Living fossil
Eggs do not hatch for 15 months
No visible ear
Active during low temperatures
Takes twenty years to become an adult

15. Tuatara

16. Turtles and Tortoises
Unique because of their shell

17. Crocodiles and Alligators
Crocodiles have a narrow head and pointed snout
Alligators have a broad head and a rounded snout

18. Lizards Most reptiles are lizards
They live in deserts, forests, jungles, and grasslands
Some are herbivores
Most are carnivores

19. Skink

20. Chameleon

21. Iguanas

22. Geckos

23. Snakes Lack legs Carnivores Do not see or hear very well
Smells using tongue

24. Snakes stick out their tongues to sample the air.

25. Snakes have special jaws with five joints that allow them to open their mouths wide and swallow very large prey.

26. Copperhead

27. Eastern Diamondback Rattlesnake

28. Cottonmouth Water Moccasin

29. Coral Snake

30. Why does a turtle live in a shell?

31. Because he can not afford an apartment.