2.41 explain how the structure of the leaf is adapted for gas exchange

Leaf stalk:

·         Supports the blade

·         Can grow to angle blade towards sun

Main vein

·         Carries the oxygen and carbon dioxide to the rest of the plant to use for photosynthesis and respiration

·         Easy access to all the leaf as it is placed in the center

Leaf blade:

·         Angled to receive the maximum amount of sunlight

·         Large surface area to volume ratio

·         Thin, flat, broad

·         Short distance for carbon dioxide to diffuse

Branching veins:

·         Allow quick transportation of carbon dioxide and oxygen to rest of plant

·         More efficient than diffusion to main vein