Upper epidermis , Layer of colourless cells that allow light to pass through to the next layer., Palisade mesophyll , Main region of photosynthesis. These cells have many chloroplasts., Spongy mesophyll, Contains many air spaces to allow gases to circulate., Lower epidermis, Provides protection. This layer also contains guard cells., Guard cells, Found on either side of each stoma. They control the opening and closing of the stomata, Stomata , Tiny pores in the leaf epidermis surrounded by guard cells that control the entry and exit of oxygen, carbon dioxide and water (Singular: stoma)., Vein, Contains xylem and phloem which allow materials to be transported into and out of the leaves..

Leaf Structure

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