Many Annelids have complex movement patterns using circular and longitudinal muscles. How is it that these musclęs, which need to contract against a rigid structure, is able to work for annelids which are soft bodied? O most annelids have a soft shell O most annelids have an endoskeleton O most annelids use a rigid cuticle O most annelids use a rigid bristles O most annelids use a rigid hydrostatic skeleton

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