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Illustrate phylum Annelida are vascular beings

Illustrate the meaning when it is stated that beings of the phylum Annelida are vascular beings? From which phyla of the animal kingdom does this feature distinguish them?

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The categorization of such beings as vascular beings means that they contain a circulatory system, with vessels which distribute substances all the way through the body.

Cnidarians, Poriferans, and flatworms do not contain a circulatory system. In nematodes there is circulation of nutrients and gases through the pseudocoelom fluid.

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