Learn about worm anatomy with free interactive flashcards.
44+ Spoon Worm Anatomy. The echiura, or spoon worms, are a small group of marine animals. Annelids typically have their bodies divided into segments, but echiurans have secondarily lost their segmentation.
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Spoon worm is a fishing tackle item. Annelids typically have their bodies divided into segments, but echiurans have secondarily lost their segmentation. Spoon worms do not have a distinct respiratory system, but absorb oxygen through the body wall.
Once treated as a separate phylum, they are now considered to belong to annelida. Learn about worm anatomy with free interactive flashcards. Source for information on spoon worms: The echiura, or spoon worms, are a small group of marine animals.