Wood Types  - There are two basic types of wood in living trees: sapwood and protection wood. Sapwood has living cells.  Protection wood does not.  Sapwood can range from two growth increments to over a hundred.  There are two types of sapwood: conducting and non-conducting.  There are four types of protection wood: heartwood, false heartwood, discolored wood in early stages, and wetwood.  Click here for more on wood types.

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