2.41: Explain How the Structure of the Leaf is Adapted for Gas Exchange

Diagram:

                              

ADAPTATIONS FOR GAS EXCHANGE:

FEATURE	ADAPTATION
INTERNAL AIR SPACES IN SPONGY MESOPHYLL LAYER	Increases the Surface Area to Volume Ratio for the Absorption of Carbon Dioxide
GUARD CELLS AROUND STOMATA	Allows the Size of the Stomata to be Adjusted to Allow Carbon Dioxide to Diffuse in, Oxygen to Diffuse Out. E.g, Opens during the Day to Allow the Diffusion of Carbon Dioxide for Photosynthesis
FLATTENED SHAPE	Larger Surface Area to Absorb More Light and Carbon Dioxide for Photosynthesis
THIN	Short Distance of Diffusion for Carbon Dioxide to Diffuse into Leaf Cells and for Oxygen to Diffuse out of Leaf Cells
STOMATA	Can Open to Allow Diffusion of Carbon Dioxide into the Leaf for Photosynthesis, and the Diffusion of Oxygen and Water Vapour Out of the Leaf