10.2 Fish Anatomy

4. Secretes digestive enzymes
5. Many rows of thin plates or disks
8. organ that enables fish to detect vibrations
10. hard, calcium carbonate structures located in the inner ear of bony fishes
11. Increases the internal surface area of the intestine
12. The study of fishes
13. A highly efficient, specialized mechanism in gills where blood flows in the opposite direction to water passing over the lamellae
14. The process of absorbing dissolved oxygen from water and releasing carbon dioxide through specialized respiratory organs called gills
15. Sensory cells
16. Wisker-like organs near the mouth
17. Males change to females and females change to males

1. The common passage for the digestive, excretory and reproductive systems in cartilaginous fishes
2. Specialized, mitochondria-rich cells located in the gills of fish, crucial for osmoregulation
3. Being able to produce sperm and eggs at the same time
6. Special sensory cells
7. nitrogenous waste product
9. Organs in the head that detect weak electrical fields
11. A pair of round openings just behind each eye