lateral hearts

Online Dictionary of Invertebrate Zoology. . 2005.

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  • lateral commissures — 1. (ANNELIDA) Commissural blood vessels. Paired segmental lateral blood vessels from the dorsal vessel to anteriorly join the ventral vessel and more posteriorly, the sub neural vessel; when contractile, they are called lateral hearts or… …   Dictionary of invertebrate zoology

  • commissural vessels — (ANNELIDA) Paired segmental lateral blood vessels from the dorsal vessel to anteriorly join the ventral vessel and more posteriorly, the sub neural vessel; when contractile, they are called lateral hearts or pseudohearts …   Dictionary of invertebrate zoology

  • circulation — circulable /serr kyeuh leuh beuhl/, adj. /serr kyeuh lay sheuhn/, n. 1. an act or instance of circulating, moving in a circle or circuit, or flowing. 2. the continuous movement of blood through the heart and blood vessels, which is maintained… …   Universalium

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  • segment — 1. A section; a part of an organ or other structure delimited naturally, artificially, or by invagination from the remainder. SYN: segmentum [TA]. SEE ALSO: metamere. 2. A territory of an organ having independent function, supply, or drainage. 3 …   Medical dictionary

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