Sclerenchyma cell wall are covered with lignin I.e they are lignified ....
therefore called lignified

Sclerenchyma cells are elongated lignified cells with pointed ends. These cells are a type of plant cells that provide mechanical support and strength to the plant body.

Sclerenchyma cells are known for their thick, lignified secondary cell walls that provide rigidity and durability to the plant tissues. These secondary cell walls are composed of cellulose, hemicellulose, and lignin, which makes them hard and inflexible.

Here are some key points about sclerenchyma cells:

1. Structure: Sclerenchyma cells are elongated cells with thick secondary cell walls. They have a narrow lumen, or central cavity, which is often obliterated due to the deposition of secondary cell wall material. The cells have pointed ends, which allows them to interlock with neighboring cells, providing additional strength.

2. Types: There are two main types of sclerenchyma cells: sclereids and fibers. Sclereids are short, irregularly shaped cells that occur in various plant tissues, such as seed coats, fruit pulp, and the hard shells of nuts. Fibers, on the other hand, are long, slender cells that occur in strands or bundles, providing strength to tissues like the xylem and phloem.

3. Function: The primary function of sclerenchyma cells is to provide mechanical support and strength to the plant. The thick secondary cell walls make them rigid and resistant to bending or stretching. They also help in protecting delicate plant tissues from damage and provide support for conducting tissues like xylem and phloem.

4. Location: Sclerenchyma cells are found in various parts of the plant, including stems, leaves, roots, and fruits. They are especially abundant in areas that require extra strength and support, such as the outer bark of trees or the seed coats of nuts.

In conclusion, elongated lignified cells with pointed ends belong to the sclerenchyma tissue. These cells provide mechanical strength and support to the plant body, ensuring its stability and protection.