Which tissue has dead cells?

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Detailed Solution

The tissue that has dead cells is sclerenchyma. Sclerenchyma is a type of permanent plant tissue made of dead cells. It provides strength, rigidity, and mechanical support to the plant. The cell walls of sclerenchyma are thick and made of lignin, a hard substance that makes the cells strong.

Structure and Function

Cell Structure: Cells are long, narrow, and have thick lignified walls. The lumen (inner cavity) is small because the walls are very thick.
Nature: These cells are dead at maturity as they lose their cytoplasm.
Function: They provide structural support and mechanical strength to different parts like stems, nuts, and seed coats.

Types of Sclerenchyma Cells

Type	Features	Examples
Fibres	Elongated cells providing tensile strength	Flax, jute
Sclereids	Irregular-shaped cells giving hardness	Nut shells, seed coats

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