tracheary element

Science Dictionary
tracheary element  [%PREMIUM_LINK%]     (trā'kē-ěr'ē)  Pronunciation Key 
Either of two types of elongated cells, tracheids and vessel elements, found in xylem in vascular plants. Tracheids are found in all vascular plants, but vessel elements are unique to angiosperms. Both kinds of cells die at maturity, but their lignified cell walls remain as the conduits through which water is carried in the xylem. See more at tracheid, vessel element.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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