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, 15:31, April 19, 2016
'''Bark''' is a hard wood-like material which covers [[tree]]s and helps transfer [[nutrient]]s. In is also a part of the tree's cambium, which adds a new layer of sap wood every year. The outside of the bark which is usually seen is known as the cork cambium, which is a hard, generally dry protective covering.<ref>http://treesforlife.org.uk/forest/forest-ecology/tree-bark</ref><br />
<br />Bark is also [[onomatopoeia]] for the vocal sound [[dog]]s sometimes make.
==References==
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