Reference Article

from Wikipedia, the free encyclopedia

Wood

Wood has been an important construction material since humans began building shelters, and remains in plentiful use today.

A tree increases in diameter by the formation, between the old wood and the inner bark, of new woody layers which envelop the entire stem, living branches, and roots.

Where there are clear seasons, this can happen in a discrete pattern, leading to what is known as growth rings, as can be seen on the end of a log.

Note: This article excerpts material from the Wikipedia article "Wood", which is released under the GNU Free Documentation License.

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last updated on 2014-08-22 at 5:36 pm EDT

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