Xylem
- Created by: Isabella Panagiotopoulou
- Created on: 12-04-21 18:53
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- Xylem
- Tube composed of dead cells that are hollow to allow free movement of water.
- Movement of water is a passive process and occurs in one direction only.
- Contains pits therefore water can be transferred between cells.
- Walls have thickened cellulose and are reinforced by lignin(providesstrength).
- Composed of tracheids and vessel elements
- Annular vessels:lignin forms a pattern of circular rings.
- Spiral vessels:lignin is present in the form of a helix or coil.
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