Reptiles
Across
4. Specialized sense organ located in the roof of reptile’s mouth that detects odors
5. Water and protein in an egg to cushion the embryo
6. Egg laying reptiles
7. Membrane that stores the nitrogen wastes of the embryo in an egg and functions in gas
exchange
9. The number of heart chambers in turtles and snakes
10. Order of tuataras
11. Mesozoic aquatic dinosaur shaped like a dolphin
16. Hit Earth causing mass extinction of dinosaurs
17. Air sacs in the lungs to increase the exchange of gases
21. The dry, scaly skin of reptiles that prevents water loss
23. Upper shell of a turtle
24. Used blood high in carbon dioxide returning to the heart from the body cells
25. Group of extinct reptiles that once dominated life on Earth
26. Gas exchange structures of reptiles
28. The ability of lizards to detach their tails to escape predators
30. Order containing turtles and tortoise
31. Bottom shell of a turtle
32. Fresh blood containing large amounts of oxygen pumped to the body cells by the heart
33. Mesozoic reptiles adapted for flight
34. Shellless eggs retained in the reptile’s body and the young born live
35. Rich food supply inside the egg
Down
1. crocodile-like ancestor of dinosaurs
2. Reptiles that warm themselves by absorbing heat from the environment
3. Snakes that wrap their bodies around and squeeze their prey to death
5. Leathery egg made by reptiles
8. Muscular wall that divides the ventricle in reptiles
12. Order of lizards
13. Protein covering over the reptile scales to prevent water loss
14. The number of heart chambers in crocodiles and alligators
15. Reptiles expand this to change air pressure in their lungs and bring in air
18. Number of loops in the circulation of reptiles
19. order for alligators
20. Heat sensitive structure behind the eye of vipers
22. Golden age of dinosaurs
27. Membrane surrounding the amniotic fluid and the developing embryo
29. The control of body temperature