Question

Name the various types of cells present in xylem. What are their functions ?

Answer 1

Xylem vessels consist of dead cells. They have a thick, strengthened cellulose cell wall with a hollow lumen. On the other hand, phloem consists of columns of living cells.

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Answer 2

Xylem – This tissue helps in the transport of water and dissolved substances throughout the plant. The different components of the xylem include tracheids, vessels, xylem parenchyma and xylem fibres.

*Tracheids form the main conductive cells of some non-flowering plants. Water moves from the cell to cell through side walls. These cells aer elongated cells with tapering ends. These cells with cell walls bear spiral, pitted or bordered-pitted thickenings.
*Vessels are advanced water conductive elements mostly seen in flowering plants. The cell walls are thickened with lignin. These provide rigidity and resistance to the cell walland prevents it from collapsing during excess transpiration.
*Xylem parenchyma are the living cells of the xylem. They perform functions like secretion and storage.
*Xylem fibres are midway between tracheids and xylem parenchyma (libriform fibres). They provide lot of support to the plants.....

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