Biology Chordate CrossWord

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Across
  1. 2. tooth-like scales
  2. 4. bony plate covering the gill chamber
  3. 7. chordates born very immature and develop in a pouch on the ventral side of the mother
  4. 8. monkeys, lemurs, apes...
  5. 11. region dealing with chemical odours
  6. 14. jawless fishes
  7. 15. source of nutrients for embryo while in egg
  8. 17. organ that helps fish change depth by filling or letting out air
  9. 18. bats
  10. 20. controls basic survival functions (breathing, heartbeat...)
Down
  1. 1. skeletal chord of connective tissue running lengthwise along the dorsal surface
  2. 3. connects embryo to placenta
  3. 5. line of sensory cells along the side of a fish's body
  4. 6. class aves
  5. 9. trunked mammals
  6. 10. human foot
  7. 12. egg that provides a self-contained environment for the embryo
  8. 13. osteichthyes
  9. 16. flesh eaters
  10. 19. capable of grasping