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Vascular tissues in a corn stem and a buttercup root

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HWC

Vascular tissues in a corn stem and a buttercup root. The cells that make up each tissue. Xylem conducts water and dissolved ions. It also helps mechanically support a plant. The cells, called vessel members and tracheids, are dead at maturity. Their lignified walls interconnect and serve as pipelines. Living cells called sieve-tube members interconnect to form sieve tubes, the conducting tubes of phloem. Companion cells are adjacent to the sieve-tube members. These specialized parenchyma cells help load organic compounds into the sieve tubes.

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