Linked from
The 39 pages that link to Wood, each with the reason it gives.
LigninBroader topic: Lignin helps give wood the stiffness needed to support upright growth.
Vascular cambiumBroader topic: Repeated cambial production of secondary xylem builds wood.
Plant anatomyBroader topic: Its cellular patterns preserve a record of stem structure and growth.
TreeBroader topic: Wood is the structural tissue accumulated as a tree grows in girth.
Plant structuresBroader topic: Wood is a structural material formed by a plant's vascular growth.