How do trees make wood?
Trees grow by forming new building blocks. Every building block has a
structure and purpose. The building blocks are cells and tissues that form
sapwood. The sapwood carries the water and food up and down the tree. When
it is old, the sapwood becomes heartwood.
Anthony Brach Ph.D.
Cells in a thin layer, called the cambium, just under the bark, divide to
produce new wood in the tree.
Click here to return to the Botany Archives
Update: June 2012