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ROUNDWORMS

ROUNDWORMS. Kingdom Animalia - Phylum Nematoda --Unsegmented worms --Pseudocoelom ("false coelom") -- body cavity contains organs. Digestive tract with 2 openings: mouth & anus. Feeding Free-living - predators Parasites - humans and animals

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ROUNDWORMS

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  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 - predatorsParasites - 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

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