CH10-Animal Classification

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Across
  1. 1. sea urchins and other marine animals with radial symmetry and spiny skin
  2. 3. these type of animals have the ability to exchange oxygen and carbon dioxide through their skin
  3. 6. long, soft-bodied animals with bilateral symmetry
  4. 8. butterflies, crabs, and scorpions are all ___
  5. 10. this structure attaches an embryo to a placenta
  6. 12. leeches are ___ worms because it has repeating body divisions that contain the same set of organs
  7. 14. this animal is a "pore-bearer"
  8. 15. unlike other reptiles, ___ have a four-chambered heart
  9. 16. stinging cells that cnidarians use to capture food
  10. 19. invertebrates with jointed appendages are called ___
  11. 21. invertebrates (except for cephalopods) that rely on hard shells for protection
  12. 23. all ___ have backbones, endoskeletons, and skulls
  13. 24. an animal that can regulate its inner body temperature
  14. 25. spiders, scorpions, and other arthropods with two body segments and eight legs
  15. 29. comes from the Hebrew words meaning "created kind"
  16. 30. all animals are ___
Down
  1. 2. invertebrates without symmetry, cephalization, or guts
  2. 4. a chelicera is a type of ___
  3. 5. lampreys and hagfish differ from other fish because they have no ___
  4. 7. periodic shedding of skin by squamates is called ___
  5. 9. sharks and rays are examples of ___ fish
  6. 11. are best described as animals that at some point during their lives have a notochord
  7. 13. the only invertebrates that can fly
  8. 17. arthropods with either eight or ten legs
  9. 18. an animal with a ___ has a digestive system with two openings
  10. 20. means that an animal has sensory organs and a brain concentrated at one end
  11. 22. a lobster is considered an invertebrate because it has no ___
  12. 26. snakes often need sunlight to warm their bodies because they are ___
  13. 27. the type of symmetry jellyfish have
  14. 28. includes jellyfish and coral