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15 Cards in this Set
- Front
- Back
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Phylum Annelida
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"segemented worms"
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Body shape of annelida?
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metameric, bilaterally symmetrical and wormlike
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What are septa?
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bristles secreted from invaginations of the distal ends of parapodia
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What is a prostomium?
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"before mouth" a lobe that projects dorsally and anteriorly to the mouth and contains numerous sensory structures including eyes, antennae, etc.
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What is a pygidium?
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end that bears anus
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What is metameres?
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segmental arrangement of body parts in an animal
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Annelida body wall description
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have cuticle, epidermis, circular muscle, longitudinal muscle / cicular muscle contracts - lengthen out / longitudinal muscle contracts - shorten
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What is the cuticle?
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a single layer of columnar cells that secrete a protective, nonliving
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What are parapodia
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"beside little foot" - lateral extensions on the side of the worms
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Setae
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they provide traction
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How do Annelida move?
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walking / fast crawling / or swimming
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Annelida digestion
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straight tube and septa suspend in the body cavity
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class Oligochaeta
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earthworms - lack parapodia - some setae
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earthworm reproduction
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monoecious / clitellum -area band
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Class Hirudinea
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Leeches - lack parapodia and setae - reproduction monoecious
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