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Network of Veins Made of main vein ⇒ branching out to form a network of fine veins Veins ⇒ carry water and mineral salts ⇒ to the cells in the leaf blade Veins ⇒ also carry manufactured food from these cells to other parts of the plant.
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Leaf blade has a large flat surface compared to its volume → enables it to obtain maximum amount of light for photosynthesis A large thin leaf blade ⇒ also means that can rapidly reach inner cells of the leaf thru diffusion
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Leaf arrangement Leaves ⇒ always organized around stem in regular pattern In general → leaves grow either in pairs (opposite one another on stem) or singly in an alternate arrangement.
- ensures that leaves are not blocking one another from light and each leaf receives sufficient/maximum light energy
- Leaf Stalk Leaf stalk → holds leaf blade away from stem → so that leaf blade can obtain sufficient light and air. some leaves, grasses, maize → leaf stalk is absent ⇒ such leaves have long leaf blade