Broad- Large surface exposed to light.
Thin- CO2 and water vapour only have a short distance to travel to reach phtosynthesising cells.
Air spaces- Located in the spongy mesophyll layer. Gases can move easily between cells. "Large surface area to volume ratio"
Chlorophyll- Found in chloroplasts. Absorbs light energy for photosynthesis.
Transparent Upper Epidermis- Light can pass into the palisade layer.
Stomata- Small holes on the lower surface. Let gases through, Let water out (transpiration)
Network of veins- Deliver water and nutrients to all parts. Take away food produced by the leaf.