AQA GCSE Biology

Revision Notes

2.5.1 Plant Tissues

Plant Tissue: Structures & Functions

  • The structures of plant tissues are related to their functions.
  • Some important plant tissues include:
    • epidermal tissues
    • palisade mesophyll
    • spongy mesophyll
    • xylem and phloem
    • meristem tissue found at the growing tips of shoots and roots

Leaf structures table

Leaf structure table, IGCSE & GCSE Biology revision notes

The Leaf

  • The leaf is a plant organ adapted specifically for photosynthesis
  • You should be able to observe and draw of a transverse section of a leaf

Structure of a leaf, IGCSE & GCSE Biology revision notes

Diagram showing the cross-section of a leaf

Adaptations of leaves table

  • The structure of a leaf maximises the diffusion of carbon dioxide into the mesophyll cells for photosynthesis:

 How photosynthesising cells obtain carbon dioxide, IGCSE & GCSE Biology revision notes

The structure of a leaf enables air to circulate within it to maximise the diffusion of carbon dioxide to the chloroplasts for photosynthesis

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Jenna studied at Cardiff University before training to become a science teacher at the University of Bath specialising in Biology (although she loves teaching all three sciences at GCSE level!). Teaching is her passion, and with 10 years experience teaching across a wide range of specifications – from GCSE and A Level Biology in the UK to IGCSE and IB Biology internationally – she knows what is required to pass those Biology exams.
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