commissural vessels of eartworm interconnect
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Answer: Lateral heart. Lateral hearts, also known as pseudohearts or commissural vessels, are blood vessels on either side of the alimentary canal of some annelids that pump blood from the dorsal vessel to the ventral vessel. The lateral hearts of Lumbricus terrestris are located in body segments 6–11.
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The commissural vessels form a loop behind each septum and they receive blood from the body wall, nephridia and prostrate glands. The commissural vessels also give out blood in each segment through a septointestinal branch to the intestine.
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