ROUNDWORMS - Strongsville City Schools

ROUNDWORMS - Strongsville City Schools

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 Reproduction: Sexual reproduction,

Separate sexes 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 Filarial Worms - found in Tropical regions of Asia -- usually transmitted by mosquitoes

-- causes elephantiasis Ascarid Worms (common roundworm) - lives in intestine - eggs are passed Most roundworms infectout in the feces

dogs, but occasionally they find their way into human hosts Hookworms - burrow into the skin from soil - mature in the intestines --hooks used to attach and suck blood

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

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