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Tissues — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceTissues2 Marks
Question
Name the different types of elements found in the xylem.
✓

Answer

Xylem is composed of cells of four different types:

  1. Tracheids.
  2. Vessels or tracheae.
  3. Xylem parenchyma.
  4. Xylem Sclerenchyma.

Except xylem parenchyma, all other xylem elements are dead and bounded by thick lignified walls. Vessels are shorter and wider than tracheids. Vessels are very long tube-like structures formed by a row of cells placed end to end. Tracheids are elongated cells with tapering ends. They also conduct water.

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