| A | B |
|---|
| Platyhelminthes | phylum name for all flatworms |
| planarian | non-parasitic (free-living) flatworm found in lakes and streams |
| regeneration | asexual means of reproduction which planarians do very well (one worm cut in half; the two halves will regrow their missing parts) |
| fluke | parasitic flatworm that feeds on blood in the lining of any number of host organs; the worm is leaf-shaped |
| tapeworm | parasitic flatworm that attaches to the wall of the host's intestine and lives off the pre-digested food in that organ |
| scolex | head-like structure on a tapeworm which has hooks and suckers |
| proglottid | Name of one of the many square and very flat body sections of a tapeworm |
| reproductive organs | A tapeworm's proglottids are mainly filled with these structures |
| digestive organs | Because of where a tapeworm lives, it definitely doesn't need to have any of these structures |
| Nematoda | phylum name for all roundworms |
| trichina | roundworm parasite that lives in the muscles of its host making them sore |
| hookworm | intestinal parasitic roundworm, common in southern U.S. states, that enters the body as a tiny larva through the bottoms of the feet of its host |
| heartworm | roundworm parasite that dogs are commonly given worming medicine to kill or prevent |
| soil nematodes | Although some of these roundworms are parasite pests on plant roots, many of them are good and very helpful worms |
| threadlike | the word "nematode" means ____. |
| Ascaris | large (up to 1 foot) parasitic roundworm that lives in the host's intestine |
| cephalization | presence of a "head" region containing nerve tissue |
| tegument | protective bady covering |
| hermaphroditic | referring to an organism that has both male and female reproductive organs |
| pharynx | muscular throat in planarians that is pushed out through the mouth like a vacuum hose |
| intestine | digestive organ where most digestion and absorption occurs |
| flame cells | part of a planarian's excretory system (for liquid wastes) |
| anus | posterior opening of the digestive track for expelling solid waste (present in roundworms, but not in flatworms) |
| trichinosis | an infection that humans can contract by eating under-cooked pork (becoming a host for trichina worms) |
