close tree trunk tropical forest thailand |
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| The trunk consists of five main parts: the bark, inner bark, cambium, sapwood, and heartwood.From the outside of the tree working in first you see the bark this is the protective layer of the trunk. Under this is the inner bark which is made of the phloem. The phloem is how the tree transports food from the roots to the shoots and vice versa. The next layer is the cambium, this is a very thin layer of undifferentiated cells that divide to replenish the phloem cells on the outside and the xylem cells to the inside |
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