Chordates & Fishes

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Across
  1. 2. protective gill flap
  2. 3. Primitive Chordate
  3. 6. Teeth-like scales that assist with faster swimming
  4. 9. Single Combination excretory opening
  5. 13. Upper Heart Chamber
  6. 14. Sensory strip of tissue that give the organism environment Info
  7. 15. Fin on the back on fish, acts as a rudder
  8. 16. Supportive spine like rod
  9. 17. Lower Heart Chamber
  10. 18. Egg Laying flat shark
  11. 19. Jawless blind fish that secretes defensive slime.
  12. 20. Fish whose fins are joined at the body
Down
  1. 1. Fin just behind the gills to assist swimming
  2. 4. Benthic Filter Feeder
  3. 5. When an organism's body temperature is environment dependent
  4. 7. Jawless tube shaped parasite
  5. 8. Balloon like organ that control buoyancy
  6. 10. Tail Fin
  7. 11. Fish whose fins stretch over spiky bone or spines
  8. 12. Benthic Egg laying shark