Duramen is present in

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(A) After certain years of growth,the xylem elements of the stems of a number of trees develop a dark brown coloration,especially in the central or in

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Inner region of secondary wood

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(A) After certain years of growth,the xylem elements of the stems of a number of trees develop a dark brown coloration,especially in the central or innermost layers.This region comprises dead elements with highly lignified walls and is called heartwood or duramen.It is present in the inner region of secondary wood.

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