Term for the tissue in the cambium (growth layer below the bark) in higher plants such as vines. This is used to transport nutrients and water from the roots to the tips of the shoots. The amazing transport speed is half a metre to one metre per hour. A distinction is made between two different, completely separate transport routes.
The xylem (wood part) consists of wide, thick-walled tubes through which the water absorbed by the root hairs flows upwards with dissolved minerals and organic substances. The wood is formed from parts of this. The phloem (sieve part) consists of narrow, thin-walled tubes through which the assimilates (organic molecules) formed by the plant during photosynthesis are transported.
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