sclerenchyma cells
Mature sclerenchyma cells are usually dead cells that have heavily thickened secondary walls containing lignin. ... (Figure 5) is composed of sclerenchyma cells, which are usually dead at m
aturity (i.e., have lost their protoplasts).
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Sclerenchyma cells are characterized by thickenings in their secondary walls. They are dead at maturity.
sclerenchyma A plant tissue whose cell walls have become impregnated with lignin. ... The cell walls contain pits, enabling the exchange of substances between adjacent cells. Mature sclerenchyma cells are dead, since the lignin makes the cell wall impermeable to water and gases.
They are made out of a non-living cellulose so that we say the cell wall is dead. ... Life is a chemical reaction, and cell walls are generally less involved in a cell's chemical reactions than the rest of the cell, but they do serve functions, can be metabolized, and otherwise perform biological functions.
