Roundworms - Phylum Nematoda

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Roundworms -Phylum Nematoda
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Roundworms -Phylum Nematoda

• A. Long, slender bodies
• B. Tapered at both ends
• C. Most are free living
• D. 1 mm to 120 cm

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• E. Simplest animal with tube-like digestive
  system
• F. Pseudocoelom
• G. Thrash to move longitudinal muscles only

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• H. Many parasitic
• a. Dog heart worms

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• b. Ascaris in children
• - Ascaris eggs in mouth
• to intestines to bloodstream
• to lungs then worm coughed up

Dont look if squeamish!
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• c. Trichinella - trichinosis
• - from undercooked pork
• - form cysts in muscles of hogs humans

Trichinella spiralis
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• d. Hookworms
• - enter bare feet
• - cause weakness tiredness from blood
  loss

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• e. Pin worms in children
• - pin worm eggs ingested to intestines
  where worm lives releases eggs that ITCH
  near anus

Pin worm eggs
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