Vertebrates

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Across
  1. 1. / What an egg does when a baby animal comes out
  2. 4. / Warm-blooded animal with hair or fur
  3. 5. / Organs that help animals breathe air
  4. 9. / Animal with a backbone
  5. 11. / Hairy coat found on mammals
  6. 13. / How fish and some amphibians move in water
  7. 14. / Protective body covering of reptiles and fish
  8. 17. / Body temperature changes with the environment
  9. 19. / Animal that lives in water and breathes through gills
  10. 20. / The bone structure running along the back
  11. 23. / Feathered animal that lays eggs
  12. 24. / Another word for backbone
  13. 25. / Body part that helps fish breathe underwater
Down
  1. 2. / A body part extending from the rear of many animals
  2. 3. / Body temperature stays the same regardless of the environment
  3. 6. / Full set of bones in an animal's body
  4. 7. / Covering found on birds
  5. 8. / Body parts fish use to swim
  6. 10. / Animal that lives part of its life in water and part on land
  7. 12. / Cold-blooded animal with dry, scaly skin
  8. 15. / How snakes and some reptiles move
  9. 16. / Hard parts that form the body’s frame
  10. 18. / Hard mouth part of birds
  11. 21. / What many vertebrates lay to reproduce
  12. 22. / How most birds move through the air