How many types of simple permanent tissues ?
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three
Simple permanent tissues are again classified into three main types. They are parenchyma, collenchyma, and sclerenchyma. Parenchyma – The cells of this tissue are living, with thin cell walls.
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Simple tissues are of three types namely parenchyma, collenchyma and sclerenchyma.
- Parenchyma – they are living cells and walled, soft in nature due to the presence of thin-walled cells.
- Collenchyma – These are characterized by uneven thick-walled living cells. This unevenness in the thickening of the cell walls imparts partially hard giving mechanical support derived essentially from the elongated cells of the ground meristems, procambium sometimes.
- Sclerenchyma – They have cells with thickened lignified walls, providing them strength and making them waterproof.
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