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The general structure of a leaf is built to do specific, needed functions.
Member rating: No Rating | Words: | Submitted: Mon Sep 08 2003
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LEAF SRTUCTURE The general structure of a leaf is built to do specific, needed functions. However the main function for most leaves is ultimately photosynthesis. Other functions include: water storage/regulation; gaseous exchange; protection (for example - spikes on cacti); and trapping food in some cases (for example Venus flytraps). The annotated diagram I have drawn below shows an example of the main structures inside a dicot leaf: This shows the structure of a general dicot leaf. The xylem and phloem are shown - indicating where the vein (vascular bundle - xylem vessels) is in the leaf cross section. Throughout the leaf the veins branch a lot to distribute water and minerals and therefore the minerals (mainly magnesium and iron) needed for chlorophyll are taken directly and easily fast the palisade mesophyll and therefore each chloroplast can...
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