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Annelida Phylum Overview Notes by api-247084136 is a document available to read on EtoBox.

What is Annelida Phylum Overview Notes about?

The document provides information about the phylum Annelida, which includes three classes: Polychaeta, Oligochaeta, and Hirudinea. Some key points are: - Annelids have a segmented body, bilateral symmetry, and a hydrostatic skeleton. They possess bristles called setae. - The nervous system includes a brain connected to ventral nerve cords with specialized sensory cells. - The circulatory system is closed with blood vessels called arteries and veins, pumped by one or two hearts.

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api-247084136

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