| 1) _erte _ r _ _ | | small bones making up the backbone |
| 2) _ ran _ _ m | | bony protection covering the brain |
| 3) a _ nath _ | | class containing hagfish & lampreys |
| 4) _ ho_d _ _ ch _ h _ e _ | | class containing sharks & rays |
| 5) _ ste _ ch _ h _ es | | class of bony fish |
| 6) ar _ h _ _ | | bony supports for the gills |
| 7) l _ _ _ ral | | line system that detects vibrations in the water |
| 8) h _ gfi _ _ | | jawless marine fish that feed on dead fish |
| 9) la _ _ re_ | | jawless and sometimes parasitic fish |
| 10) ex _ e _ _ a _ | | fertilization in jawless fish |
| 11) _ _ _ _ ila_e | | flexible protein material in the skeleton of sharks |
| 12) p _ a _ oid | | toothlike scales on sharks |
| 13) _ _ c _ oral | | fins on sharks that appear like wings of an airplane |
| 14) o_f _ _ _ o _ y | | responsible for the shark’s acute sense of smell |
| 15) _ a _ | | flattened bat like fish with a skeleton of cartilage |
| 16) sl _ t _ | | openings into the gills on cartilagenous fish |
| 17) c _ _ _ _ ers | | modified pelvic fins of male sharks used to transfer sperm |
| 18) _ er _ h | | example of a ray finned fish |
| 19) o_er _ _ l _ _ | | bony covering over the gills of bony fish |
| 20) _a _ d _ l | | tail fin |
| 21) _iv _ _ | | organ that secretes bile to digest fats |
| 22) a _ t _ ri _ s | | carry blood away from the heart |
| 23) vein _ | | return blood to the heart |
| 24) _ t_iu _ | | heart chamber that receives blood bck form the heart |
| 25) _e _ t _ icl _ | | pumping chamber of the heart |
| 26) co _ _ te _ _ urr _ nt | | movement of blod across a fish’s gills for maximum absorption of oxygen |
| 27) b _ oyan _ _ | | property that the swim bladder gives to a fish |
| 28) _ er _ _ rum | | forebrain |
| 29) c _ r _ _ _ llum | | hindbrain |
| 30) spa _ _ in _ | | reproductive behavior where fish build nests and lay their eggs |
