prevents water from gathering on the leaf and breaking it - waxy cuticle , contains DNA and chromosomes, controls the cells functions - nucleus , where photosynthesis takes place, filled with chlorophyll - chloroplast, allows diffusion to take place into the mesophyll - air space, made up of the guard cells and stomata - lower epidermis, hole where O2 comes out and CO2 goes in  - stomata , opens and closes the stomata - guard cell , where diffusion takes place - spongey mesophyll , where most photosynthesis takes place - palisade layer, made of the waxy cuticle and the palisade layer - upper epidermis ,

CAX KS4 structures of a leaf

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