| 1) _at_he _ m _ _ th_s | | phylum of flatworms |
| 2) _ hre_ | | number of body layers in worms |
| 3) b _ l _ te_al | | symmetry f flatworms |
| 4) d _ rs _ l | | upper body surface of worms |
| 5) _ en _ ral | | lower body surface of worms |
| 6) _cto _ erm | | outermost cell layer of worms |
| 7) _es _ d _ rm | | middle cell layer of worms |
| 8) _ nd_der _ | | innermost cell layer of worms |
| 9) _c _ e _ om_te | | solid body in flatworms |
| 10) _oe _ o _ | | body cavity |
| 11) _ast_ov _ sc _ l _ r | | gut with a single opening in flatworms |
| 12) a _ sor_ti _ n | | how flatworms exchanges gases with their environment |
| 13) _nte _ io _ | | head or front end of a flatworm |
| 14) c _ ph _ li _ ati_n | | anterior end with sensory structures concentrated there |
| 15) p _ r _ si_e | | worms that live on or inside the body of their host |
| 16) _ur_ell _ r _ _ | | class of flatworms containing the frehwater planarian |
| 17) p _ ar _ n_ | | extendable feeding tube on the underside of planarians |
| 18) _ ucu_ | | secreted by planarians to glide across |
| 19) f _ a_e | | excretory cells in worms that filter wastes |
| 20) a _ _ lia | | clusters of nerve cells in worms |
| 21) _erm _ _ hr _ di_es | | worms that make both eggs & sperm |
| 22) _re _ a _ oda | | class of flatworms containg flukes |
| 23) _ucke _ s | | found on the ends of flukes to attach to hosts |
| 24) _e _ u _ ent | | tough outer covering on flukes |
| 25) _ e _ to_a _ | | class containing tapeworms |
| 26) s _ ol _ x | | anterior end of a tapeworm with hooks & suckers |
| 27) _r_gl _ t_id _ | | reproductive sections of a tapeworm’s body |
| 28) _e _ _ to_a | | phylum for roundworms |
| 29) _a _ er | | shape of both ends of a roundworms body |
| 30) _ ut _ cle | | protective noncellular layer of roundworms |
| 31) a _ ca _ is | | roundworm found in pig & horse intestines |
| 32) _ oo _ w_r_s | | intestinal parasitic roundworm with cutting plates in it’s mouth |
| 33) _ri_h _ n _ _ is | | disease that result from eating infected undercooked pork |
| 34) _i _ wo_m _ | | most common parasitic roundworm of children in the U.S. |
| 35) _ot _ f _ ra | | phylum of worms with a crown of cilia surrounding the mouth |
| 36) _as _ _ x | | muscular organ of rotifers to break down food |
| 37) _se _ do_oel _ mat _ _ | | rotifers & nematodes are examples |
