dorsal blood vessel
From ZooTerms (Dictionary of Invertebrate Zoology)
dorsal blood vessel: 1. (Arthropoda: Insecta) The posterior heart and anterior aorta.
2. (Echiura) A dorsal tubular blood vessel in the anterior part of the body cavity often associated with the foregut; functioning in the transport of blood anteriorly to the median vessel of the proboscis; sometimes called the heart.
