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