Cork is composed of dead cells that are compactly arranged without intercellular space. These cells have walls containing suberin, which makes them impervious to gases and water.
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Xylem fibres provide structural support to the plant, reinforcing the xylem tissue and helping to maintain the plant’s rigidity and stability, essential for standing upright and withstanding external forces.
Xylem parenchyma stores food and nutrients within the vascular tissue, providing essential metabolic support and maintaining the health and functionality of the xylem in the plant.
In the vascular bundle of a plant stem, different types of cells can be observed, including tracheids, vessels, xylem parenchyma, and xylem fibres.
The presence of vascular tissue is a distinctive feature of complex plants that has facilitated their survival in terrestrial environments.