Fish
Across
6. System of sensory canals on the side of fish that detect vibrations in the water
7. Cover the body of bony fish and reduce friction when swimming
9. Small blood vessels in the gills where gas exchange occurs
11. Less toxic nitrogen waste released by cartilaginous fish
12. Reproductive behavior of fish
14. Part of the brain that controls muscular movement
16. whisker-like structures on the head of catfish that can taste
17. Pair of fins on the side of a perch’s body behind the operculum
18. Secretes bile to digest fats
19. A type of lobe-finned fish
24. Opening for the elimination of wastes
25. Bony covering over the gills of bony fish
26. Lower heart chamber
29. Excretory structures in fish
30. Type of fertilization in sharks and rays
32. The type of scales on sharks
33. Jawless fish with a disk-shaped mouth designed to attach to prey, scrap a hole, and
feed on the host’s blood
34. Cartilaginous fish with paired, winglike pectoral fins
Down
1. Flow of water across gills opposite to the direction of blood flow
2. Gas filled sac in bony fish used to control buoyancy
3. Makes up the skeleton of sharks, rays, and skates
4. Tail fin on a perch
5. Respiratory organs in fish
8. The ability to detect chemicals in the environment
10. Upper heart chamber
13. Projections on the gills of basking sharks to filter food from the water
15. Skull of a fish or other vertebrate animal
20. Secretes acids for digestion
21. Two fins on the upper surface of a perch used for keeping the fish upright and moving
forward
22. Fingerlike projections for absorption in the intestines
23. torpedo-shape of a shark’s body
24. Carry blood away from the heart
27. Number of chambers in the fish heart
28. Both hagfish and lampreys lack these structures
31. Eel shaped fish without jaws that retains its notochord