Animal Locomotion - Structures for Movement

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Across
  1. 4. Most animals have _____ attached to their bones to help them move.
  2. 5. Birds have hollow _____ to help them fly.
  3. 8. Birds' wings are covered in _____.
  4. 10. Squid can move by squeezing out _____ of water.
  5. 11. Animals push on water by swimming with _____.
  6. 12. Animals push on air by flying with _____.
Down
  1. 1. Muscles _____ on bones to cause movement.
  2. 2. _____ cover the bodies of fish and help them glide through water.
  3. 3. Ducks, frogs, and other animals that live near water have _____ feet to help them swim.
  4. 6. _____ are special scales on the bellies of snakes that help them slither.
  5. 7. Animals push on land by walking and running with _____.
  6. 9. _____ are string-like structures that attach muscles to bones.