B4c - Revision cards

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Name the five parts of a leaf?

     cuticle

     upper and lower epidermis

     palisadeandspongy mesophyll layers

     stomata and guard cells

     vascular bundle

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How are leaves adapted for efficient photosynthesi

  • Broad so large surface area
  • Thinso short distance for gases to diffusion
  • Contain chlorophyll and other pigmentsto absorb light from different parts of spectrum
  • Have a network of vascular bundles for support and transport
  • Guard cells which open and close the stomata
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How is the cellular structure of the leaf adapted

        epidermis is transparent

        palisadelayer at the top containing most of the chloroplasts

        air spaces inthe spongy mesophyll allow diffusion between stomata and photosynthesising cells

        internals urface area/volume ratio very large.

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