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Unformatted text preview: feeding? 8. What structures do members of the Subphyla Cephalochordata, Urochordata, Craniata, and classes Myxini and Petromyzontida lack compared to all other members of the phylum Chordata? 9. What is the function of the spiral valve? 10. What is the function of gill rakers in bony fish? 11. What is the function of the lateral lines in fish? 12. What is the function of the swim bladder and how does it work? How does it compare to the organ with the same function in the shark? 13. Starting with deoxygenated blood, list the structures through which blood flows in the fish heart. 14. How many chambers are there in the shark’s heart? 15. What traits distinguish mammals from other chordates?...
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- Fall '08
- Phylum Chordata, Ectotherm, Bivium Spiral Valve Homeotherm Operculum, Chordata Review Questions