water vascular system


  • WordNet 3.6
    • n water vascular system system of fluid-filled tubes used by echinoderms in locomotion and feeding and respiration
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Webster's Revised Unabridged Dictionary
    • Water vascular system (Zoöl) a system of vessels in annelids, nemerteans, and many other invertebrates, containing a circulating fluid analogous to blood, but not of the same composition. In annelids the fluid which they contain is usually red, but in some it is green, in others yellow, or whitish.
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In literature:

The Water-vascular System is a structure common to all Echinoderms; and vessels of a comparable character are found in some worms.
"Stories of the Universe: Animal Life" by B. Lindsay