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22 Cards in this Set
- Front
- Back
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pharynx
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muscular tube which planarians use to ingest food
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flame cells
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cells that connect to excretory tubules in planarians
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cerebral ganglia
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clusters of nerve cells at the anterior end of a planarian
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eyespots
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cup shaped 'organs' that sense the intensity and direction of light
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flukes
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leaf shaped flatworms that parasitize many animals
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tegument
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layer that covers the external surface
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primary host
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the host from which the adult parasite gets its nourishment and in shich sexual reproduction occurs
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intermediate host
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host from which the larvae derive their nourishment
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schistosomiasis
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disease caused when schistosomes penetrate the walls of veins and the small intestine or urinary bladder
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proglottids
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a long series of body sections that make up a tapeworm
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cyst
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dormant larvae surrounded by a protective covering
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roundworms
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worms with long, slender bodies that taper at both ends
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cuticle
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protective, noncellular layer that covers a roundworm
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hookworms
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intestinal roundworm parasites that feed on the host's blood
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trichinosis
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caused by trichinella. this disease causes muscle pain and stiffness
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pinworm
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the most common roundworm of humans in the US. they lay their eggs on the skin around the anus
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filarial worms
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worms that live in the lymphatic system and are spread by mosquitoes
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elephantiasis
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effect of severe filarial worms when the limbs become extremely swollen and skin hardens and thickens
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Toxocara canis
Toxocara cati |
filarial worm that causes heartworm in dogs and cats
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mastax
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muscular organ that breaks down food in rotifers
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cloaca
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common chamber in which the digestive, reproductive, and excretory systems of the rotifer empty
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parthenogenesis
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process in which unfertilized eggs develop into adult females
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