| A | B |
|---|
| Flatworms | Memebers of the phylum platyhelminthes. |
| Pharynx | A muscular tube in planarians in which they obtain food. |
| Flame Cells | in a flatworm, a cell that collects excess body water and transfers it to the excretory system. |
| Cerebral Ganglia | One of a pair of nerve cell clusters that serve as a brain at the anterior end of some invertebrates. |
| Eyespots | A localized region of pigement in some invertebrates and protozoa that detects changes in the quantity of light. |
| Fission | A type of asexual reproduction in which the organism splits in two |
| Flukes | A leaf-shaped parasitic flatworm. |
| Tegument | A continuous sheet of fused cells that covers the external surface of a fluke or a tapeworm and protects the worm from the host's digestive and immune system. |
| Uterus | A female reproductive structure where eggs are stored or fertilized or where development of the young occurs. |
| Primary Host | The host from which the adults of the parasite derive their nourishment and in which sexual reproduction occurs. |
| Intermediate host | The host from which the larva of a parasite derive their nourishment. |
| Schistosomiasis | A disease caused by a parasitic blood fluke of the genus Schistosoma. |
| Swimmer's itch | a condition characterized by minor skin irritation and swelling, caused by a small, brown fluke that ususally lives in freshwater. |
| Tapeworms | A parasitic flatworm the lives in vertebrate intestines. |
| Scolex | A knob-shaped organ bearing hooks and suckers; lies at eh anterior end of a tapeworm. |
| Proglottids | one of many body sections of a tapeworm; contains reproductive organs. |
| Roundworms | a worm in the phylum Nematoda with a long, slender body that tapers at both ends, such as hookworms and pinworms. |
| Anus | The posterior opening of the digestive tract. |
| Cuticle | A noncellular layer that protects the worm from the host's digestive and immune system. |
| Hookworms | A parasitic roundworm that feeds on its host's blood by cutting into the intestinal wall. |
| Trichinosis | A disease caused by a parasitic roundworm of the genus Trichinella; characterized by muscle pain and stiffness. |
| Pinworm | Roundworm parasite that lives in the lower intestines of humans but causes no serious disease. |
| Filarial worms | One of a variety of parasitic roundworms that cause elephantiasis in humans and heartworm disease in dogs. |
| Elephantiasis | a condition of swollen lymphatic vessels in the limbs casued by a parasitic filarial worm. |
| Heartworm disease | A diease of the heart and large arteries in dogs caused bya filarial worm. |
| Rotifers | A small, aquatic invertebrate with a crown of cilia surrounding its mouth. |
| Mastax | A muscualr organ that breaks up food in rotifers. |
| Cloaca | A common chamber in which the digestive, reproductive, and excretory systems enter. |
