Classification of animals

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Across
  1. 4. This is a group of animals that have hard exoskeleton and they have legs
  2. 5. This is a group of animals that have fur and give birth to their young
  3. 8. This is a group of animals that have no legs but it has long cylindrical body
  4. 10. This is a group of animals that have dry and rough scaly skin
  5. 11. This is a group of animals that have soft body and a muscular foot
  6. 12. This is a group of animals with backbone
  7. 13. This is a group of animals with beak and feathers
Down
  1. 1. This is a group of animals that have hard exoskeleton body but with 4 pairs of legs
  2. 2. This is a group of animals that breathe through gills
  3. 3. This is a characteristic where an animal's internal body temperature does not change according to the surrounding
  4. 6. This is a group of animals that have hard exoskeleton body but with more than 8 legs
  5. 7. This is a group of animals that have moist and smooth body
  6. 9. This is a group of animals that have hard exoskeleton but with 6 legs