sapwood

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Related to Alburnum: duramen

sapwood

(săp′wo͝od′)
n.
The newly formed outer wood located just inside the vascular cambium of a tree trunk and active in the conduction of water. Sapwood is usually lighter in color than heartwood.

sapwood

the ring of living XYLEM tissue in a stem or root which has undergone SECONDARY THICKENING, and which is composed of VESSELS and PARENCHYMA cells. Sapwood lies outside the HEARTWOOD but inside the ring of PHLOEM.
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