GCSE Biology (AQA)

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Comparing Xylem & Phloem

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Organisation Plant Tissues, Organs and Systems

Comparing Xylem & Phloem

2:07 Xylem, Phloem and Meristem Tissue
Spec 4.2.3.1 4.2.3.2 4.1.1.3
Previous Phloem Next Meristem Tissue
  • Xylem and Phloem are parts of the plant transport organ system.
  • The diagram illustrates the inside of a plant stem, highlighting vascular bundles.
  • Vascular bundles consist of xylem (blue) and phloem (red).
  • Vascular bundles in plants are analogous to the vascular system of arteries and veins in animals.
  • Xylem and phloem differ in the substances they transport and the directions of transport.
  • Xylem transports water and minerals upwards towards the leaves.
  • Phloem transports dissolved sugars in both upward and downward directions.
  • Xylem is composed of dead, elongated cells without cytoplasm, forming a continuous tube reinforced with lignin.
  • Phloem consists of living, elongated cells with cytoplasm, connected by pores, and lacks structural reinforcement.
  • Energy is not required for transport in xylem, whereas phloem needs energy from outer cells for sugar transport.

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