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Phloem

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Key Stage 3

Meaning

A diagram showing several phloem cells with companion cells and sieve plates.

The phloem is the tube in a plant which transports sugars from the leaf to the roots.

About the Phloem

Phloem transports sugars in the leaves, made by photosynthesis, to other organs in the plant.
Phloem is found next to the xylem tissue and together they make a plant vein.
The process of sugar transport around the plant is known as translocation.

Key Stage 4

Meaning

The phloem is the tube in a plant which transports sugars from the leaf to the roots.

About the Phloem

Phloem transports sugars in the leaves, made by photosynthesis, to other organs in the plant.
Phloem is found next to the xylem tissue and together they make a plant vein.
The process of sugar transport around the plant is known as translocation.
Phloem is formed by phloem cells connecting the vacuoles of one phloem cell to the next. The cell wall between each phloem cell has small holes in it and is known as a sieve plate. The phloem cell lose many of their organelles, including mitochondria so they are supported by companion cells which keep them alive.

References

AQA

Phloem, pages 10, 69, GCSE Biology, Hodder, AQA
Phloem, pages 10, 69, GCSE Combined Science Trilogy 1, Hodder, AQA
Phloem, pages 13, 62-65, GCSE Biology; Third Edition, Oxford University Press, AQA
Phloem, pages 55, 72-3, 76-7, 86, GCSE Biology; Student Book, Collins, AQA