Across
- 4. most commonly occurring respiratory pigment in molluscs
- 7. Iron containing protein
- 8. contains green iron
- 10. circulating blood cells
- 12. where blood circulates in the confines of tubular vessels
- 14. respiration supplement gas exchange
- 16. contains pink iron
- 17. fluid filled internal cavity
- 19. organic compounds that have either metallic copper or iron
- 21. oxygen bind to hemoglobin to form
Down
- 1. paired invaginations of the ventral body
- 2. cellular component of vertebrate
- 3. reddish pigment that contains iron as a binding metal
- 5. the circulating fluid of animals with an open system
- 6. internal sac-shaped respiratory organ
- 9. where the heart pumps hemolymph into the body
- 11. the straw colored liquid part of blood
- 13. plasma from whip the proteins involved in blood clotting
- 15. ability for organ to exchange gases
- 18. specialized system for heart pumping
- 20. grapelike outpouchings