Across
- 5. muscular part of the heart
- 6. what this entire presentation is based on
- 7. reduces water friction
- 9. a form of external fertilization
- 11. main sensory system
- 12. fertilized fish eggs
Down
- 1. type of ray finned fishes (Dolphin)
- 2. the flow in the opposite direction
- 3. teeth that point inward
- 4. helps a fish breathe
- 6. harder than cartilage
- 8. sac that controls fishes buoyancy
- 10. where urine is expelled