Xylem is the part of the vascular system, in plants, that transfers water and dissolved minerals from the roots to the rest of the plant. Xylem also help with mechanical support of stems and mature roots. The tissues of xylem are made of water-conducting cells that are slender and have holes in the center so water can pass. They are important because without them plants and trees could not get proper distribution of water and disolved minerals. In the picture is a tree stump becuase it is said that xylem make up the wood of trees.
xylem. (2011). In Encyclopædia Britannica. Retrieved from http://www.britannica.com/EBchecked/topic/650951/xylem
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