Differentiate between sclerenchyma and parenchyma tissues. Draw well labelled diagram.
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Differences between parenchyma and sclerenchyma. Parenchyma Sclerenchyma (1) Cells are thin walled and (1) Cells are thick walled and unspecialised lignified (2) These are living cells (2) Tissues are made up of dead cells (3) Cells are usually loosely packed (3) No intercellular spaces between with large intercellular space the cells are found (4) Stores nutrient and water in stem (4) Provides strength to the plant and roots parts (5) Some cells contain chlorophyll (5) The cells are long and narrow, called chlorenchyma and make the plant hard and stiff. perform photosynthesis. Other The tissue is present in the stem cells have large air cavities called around vascular bundles, in aerenchyma which provide veines of leaves and hard buoyancy to the hydrophytic covering of seeds and nuts. plants Cytoplasm Intercellular spaces Nucleus Middle lamella Chloroplast Vacuole Intercellular space T.S. Parenchyma Primary cell wall L.S. Parenchyma Simple pit pair Narrow lumen Lignified thick wall T.S. Sclerenchyma L.S. Sclerenchyma