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19 Cards in this Set
- Front
- Back
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What are the 3 classes of annelids
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Oliogochaeta, Polychaeta, and Hirudinea
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What are setae
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Bristle-like structures that help with movement
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Parapodia
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Leg like structures used for moving
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Earthworms can be found in what class ?
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Oligochaeta
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Circular
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Cause the worm to lengthen when they contract
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Longitudinal
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Cause the worm to shorten when they contract
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What does the pharynx help bring into the mouth ?
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Soil
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Earthworms eat their way through______
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Soil
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Where does respiration occur in the earthworm
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It's skin
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Respiration can only occur when the skin is...
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Moist
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Earthworms have a ____ digestive tract
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One-way
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Earthworms exchange ______ to fertilize one another
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Sperm
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Oldest and largest class
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Polychaetes
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Are Polychaetes sessile or mobile?
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Both
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Hirudinea have no what?
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Setae and parapodia
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Two invertebrate phyla that are closely related
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Annelids and Mollusca
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Annelida
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Contains earthworms, leeches, and segmented marine worms
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Mollusca:
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Contains snails, clams, squids etc.
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Similar larval stage of Annelids and Mollusks
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Trochopore
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