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| Bored? Have fun with leafs. |
In botany, a leaf is an above-ground plant organ
specialized for photosynthesis. For this purpose,
a leaf is typically flat (laminar) and thin, to
expose the cells containing chloroplast (chlorenchyma
tissue, a type of parenchyma) to light over a broad
area, and to allow light to penetrate fully into
the tissues. Leaves are also the sites in most plants
where transpiration and guttation take place. Leaves
can store food and water, and are modified in some
plants for other purposes. The comparable structures
of ferns are correctly referred to as fronds. Furthermore,
leaves are prominent in the human diet as leaf vegetables... |
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