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Rotifers

Rotifers. Micah Vinovskis and Jess Zelenak. Phylum Rotifera. “Wheel animals” Aquatic Microscopic Multicellular More than 1800 species. Classification. Ecdysozoans (related to nematodes and arthropods) because of cuticle Other scientists classify as lophotrochozoans. Habitat .

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Rotifers

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  1. Rotifers Micah Vinovskis and Jess Zelenak

  2. Phylum Rotifera • “Wheel animals” • Aquatic • Microscopic • Multicellular • More than 1800 species

  3. Classification • Ecdysozoans (related to nematodes and arthropods) because of cuticle • Other scientists classify as lophotrochozoans

  4. Habitat • Mostly fresh water • Some in marine environments • Some in damp soil

  5. Anatomy • Possibly evolved from animals with a coelom or body cavity • Space filled with fluid between the body wall and the digestive tube • Cuticle • Crown of cilia on anterior end • Cilia beat rapidly like a spinning wheel

  6. Food • Tiny organisms in the stream of water drawn into their mouths • Muscular organ posterior to mouth grinds up food • Wastes eliminated through anus • Excess water and metabolic wastes excreted by protonephridia with flame cells

  7. Nervous System • Consists of “brain” and sense organs • Eyespots

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