Roundworms & Segmented Worms. 5 th Grade. Roundworms. *live in any moist environment: --the beach --forest soils --Antarctic sands --pools of super hot water . Did you Know ? About a million roundworms live in each square meter of damp sand.
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*live in any moist environment:
--pools of super hot water
Closed circulatory system – blood moves only within a connected network of tubes called blood vessels