1. ROUNDWORMS Kingdom Animalia - Phylum Nematoda --Unsegmented worms --Pseudocoelom ("false coelom") -- body cavity contains organs

2. Digestive tract with 2 openings: mouth & anus Feeding Free-living - predators Parasites - humans and animals Reproduction: Sexual reproduction, Separate sexes (male & female)

3. Roundworms & Disease Trichinosis (trichinella worm) - cysts within the muscles are consumed (undercooked food) -- worm grows in intestine -- forms cysts in the muscles of the new host -- symptom: terrible pain in muscles

4. Filarial Worms - found in Tropical regions of Asia -- usually transmitted by mosquitoes -- causes elephantiasis

5. Ascarid Worms (common roundworm) - lives in intestine - eggs are passed out in the feces Most roundworms infect dogs, but occasionally they find their way into human hosts

6. Hookworms - burrow into the skin from soil - mature in the intestines --hooks used to attach and suck blood

7. Research on C. elegans ● first organism to have DNA completely sequenced ● It is a very simple, free living roundworm