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

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

4. Roundworms & Disease Trichinosis (caused by the 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

5. Filarial Worms - found in Tropical regions of Asia
usually transmitted by mosquitoes
causes elephantiasis
heartworms are filarial

6. 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

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

8. Pinworms or Threadworms
Ingested from hands, contaminated food or rarely water
Fecal contamination and oral ingestion.
2-4 week life cycle.

9. Beneficial in Gardens
Some nematodes parasitize grubs and larva of insects that damage crops and lawns.

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