Ch. 39 Part 1

1234567891011121314151617
Across
  1. 3. respiratory organs of fishes
  2. 7. flexible material made of cells surrounded by protein
  3. 9. small toothlike scales that feel like sandpaper
  4. 12. male impregnates female by injecting sperm into female
  5. 13. lobe finned fish
  6. 14. skeletal elements that support pharynx
  7. 16. birds
  8. 17. tapered at head and tail, shape of shark
Down
  1. 1. frogs salamanders toads
  2. 2. hagfishes
  3. 4. ray finned fish
  4. 5. humans mice deer rats
  5. 6. sharks rays skates
  6. 8. lamprey
  7. 10. ability to detect chemicals in environment
  8. 11. allow fish to sense vibrations in water
  9. 13. fills with air to maintain bouyancy
  10. 15. turtles snakes crocodiles