What are the morphological similarities and differences between nematodes and annelids?

What are the morphological similarities and differences between nematodes and annelids?
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Nematodes, like annelids, have a cylindrical elongated body. Annelids differentiate from nematodes by presenting a segmented body (body divided into metameres) and so they are called segmented worms.
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$ The first formed embryonic cavity is called blastocoel. ! Annelids have a segmented body.

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