Combined Science GCSE
Air spaces
What Air spaces means in Combined Science GCSE, as defined for AQA.
Definitions of Air spaces
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Reference: AQA
Gaps between spongy mesophyll cells that connect to the stomata on the lower surface, so carbon dioxide can diffuse through the leaf to reach the photosynthetic cells and oxygen can diffuse out.
Gaps between palisade cells that let carbon dioxide reach them and oxygen leave.
Topics that use Air spaces
- Plant tissues (AQA GCSE)
Related terms
- Chloroplasts
- Epidermal tissue
- Gas exchange and diffusion
- Guard cells
- Meristem tissue
- Palisade mesophyll
- Phloem
- Specialised plant cells
Using Air spaces in the exam
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