Simple tissues are of three types, namely parenchyma, collenchyma and sclerenchyma.
They are living cells and walled, soft in nature due to the presence of thin-walled cells.
Parenchyma consisting of chloroplasts are termed chlorenchyma. These tissues help in photosynthesis. Some parenchymatous cells perform as storage chambers for starch in vegetables and fruits.
These are characterised by uneven thick-walled living cells. This unevenness in the thickening
of the cell walls offers flexibility with the structural framework and provides mechanical support.
They have cells with thickened lignified walls, providing them strength and making them waterproof.
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