Xylem
Contents
Key Stage 3
Key Stage 4
Meaning
The Xylem is a tube used to transport of water in plants.
About Xylem
- Xylem transports water and minerals absorbed by the roots up to the leaves.
- Water is transported along the xylem by a process called transpiration.
- The xylem supports the stem of the plant making it harder to bend under its own weight.
- The xylem is formed when xylem cells create a chemical called lignin which builds up in a spiral shape around the cell wall. The xylem cells then die to leave behind hollow tubes supported by the spiral of lignin.
References
AQA
- Xylem, pages 10, 69, GCSE Combined Science Trilogy 1, Hodder, AQA
- Xylem, pages 12-13, 62-65, GCSE Biology; Third Edition, Oxford University Press, AQA
- Xylem, pages 55, 70, 72-3, 108, GCSE Biology; Student Book, Collins, AQA
- Xylem, pages 9, 10, 69, GCSE Biology, Hodder, AQA
Edexcel
- Xylem, page 49, GCSE Combined Science; The Revision Guide, CGP, Edexcel
- Xylem, pages 207, 213, GCSE Biology, CGP, Edexcel
- Xylem, pages 71, 73, GCSE Biology; The Revision Guide, CGP, Edexcel