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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恢復自動保存: ?