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  Section: Zoological Terms used in General Zoology
 
 
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W - Zoological Terms

 
     
 
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water-vascular system

System of fluid-filled closed tubes and ducts peculiar to echinoderms; used to move tentacles and tube feet that serve variously for clinging, food handling, locomotion, and respiration.




weir

(wer) (Old English wer, a fence placed in a stream to catch fish). Interlocking extensions of a flame cell and a collecting tubule cell in some protonephridia.




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