Role of the Phloem (Edexcel IGCSE Biology: Double Science)
Revision Note
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LáraExpertise
Biology Lead
Phloem
Structure and function of the phloem
- Phloem vessels transport food materials (mainly sucrose and amino acids) made by the plant from photosynthesising leaves to non-photosynthesising regions in the roots and stem (pronounced: flow-em)
- This means that movement can be in any direction around the plant
- The phloem has structural features different to the xylem
- The cells are living cells and are not hollow
- Substances move from cell to cell through pores in the end walls of each cell
The position of the xylem and phloem in the stem compared to the root
Exam Tip
If you are asked to identify the xylem or phloem in a diagram showing a cross-section of a root, stem or leaf just remember that xylem is always on the inside and phloem is always on the outside.
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