Question

Distinguish between tracheids and vessels?​

Answer 1

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$\large \bold{\underline{\sf{\blue{Tracheids}}}}$

1. Main conducting elements of pteridophytes and gymnosperms

2. Tracheids originate from single cells

3.  Tracheids have a comparatively narrow diameter

4. They have large pits which are less in number

5. They are imperforated cells

6. They are less efficient in water conduction due to the absence of perforations

7. Walls are more thickened with narrow lumen

8. Average length upto 1 m. m (rarely 12 cms.)

$\large \bold{\underline{\sf{\blue{Vessels:-}}}}$

1.  Main conducting elements of angiosperms

2.  Vessel members, which are joined into long continuous tubes, originate from longitudinal file of cells

3. Vessels have a comparatively wide diameter

4. They have small pits which are larger in number

5.They are perforated cells

6. They are more efficient in water conduction due to the presence of perforations

7. Walls are less thickened with large lumen

8. Average length upto 10 cms or more( Rarely 2-6 metres)

Answer 2

Tracheids

1. They have comparatively narrow diameter.
2. they have very few large pits.
3. They are imperforated cells.
4. Walls are more thicken and narrow lumen.
5. They are the conducting elements of pteridophyte and gymnosperms.

Vessels

1. They have comparatively wider diameter.
2. They have numerous small pits.
3. They are perforated cells.
4. Walls are less thicken with wide lumen.
5. They are conducting elements of angiosperm.

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