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The earthorm has a closed circulatory system with five main blood vessels:

  • Dorsal (above the digestive tract) - it moves blood forward
The remaining four all move the blood to the rear of the earthworm:
  • Ventral (beneath the digestive tract)
  • Subneural Vessel (below the nerve cord)
  • Right & Left Lateroneural vessels (either side of nerve cord)
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