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10 Cards in this Set
- Front
- Back
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pseudocoelomates
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have a distinct body cavity
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cuticle
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may bear spines, scales, or other form of ornamentation that protect the animal and are useful to taxonomists
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ecdysis
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shed the cuticle / molt
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phylum nematoda
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they molt / called roundworms / 5 billion per acre on earth / 16000 species to 500000 / feed on every conveivable source of organic matter
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roundworm description
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triploblastic / bilateral / round body / complete digestive tract / body wall has only longitudinal muscles
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roundworm body form
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bilaterally symmetrical / elongate / tapered at ends / round
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roundworm locomotion
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have longitudinal muscle only
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roundworm digestion
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complete / mouth / pharynx / long intestine / anus
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roundworm reproduction
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dioecious
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roundworm examples
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Ascaris (giant intestinal roundworm) / pinworms / hookworms / trichina worms cause trichinosis / filarial worms cause elephantitis
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