Class Oligochaetes (Earthworms)

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6 Terms

1
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What role do earthworms play in solid?

they eat their way through soil with undigested matter excreted as nutrient

2
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How is the coelom of earthworm partitioned?

segmented by septa

3
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What do the longitudinal and circular muscles contract against?

the coelomic fluid which acts as a hydrostatic skeleton

4
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What is significant about the skin of Earth worms?

skin is well vascularized and used for respiration

5
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How do earthworms mate?

form slime tubes to help adhere to each other, sperm is exchanged, process may take up to an hour

6
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What happens after mating worms separate?

they each produce a cocoon about a quarter inch long. One or two worms will hatch from each cocoon after several weeks