CBSE Class 11-science Answered

Sclerenchyma is one of the simple permanent tissues.

The cells are long, narrow thick.

The cell walls are lignified with numerous perforated pits.

The cells of sclerenchyma are dead and without protoplast.

Sclerenchyma may be in fibre form or in sclereid form.

The fibres are thick walled, elongated and pointed cells occur in groups.

Sclereids are spherical, oval or cylindrical.

Sclereids are highly thickened dead cells with the narrow lumen,

Sclereids are found in fruit walls of guava, nuts etc.

The sclerenchyma provides the medical support to plants.