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Ch-6 l Tissues l Simple Permanent tissue l Class- 9th l NCERT l CBSE


Ch-6 l Tissues l Simple Permanent tissue l Class- 9th l NCERT l CBSE
Topic: Simple Permanent Tissue
This session includes detailed information about permanent tissues which are non- dividing tissues present in plants. In simple words, the permanent tissues in a plant are those tissues that contain nondividing cells. The cells are also modified to perform specific functions in the plants. The cells of the permanent tissue are derived from the meristematic tissue.

The permanent tissue cells are also fully differentiated. The cells are large and a definite shape and size. You can see intercellular spaces being present in between the cells. Large vacuoles are also present inside these cells. The metabolism that occurs in the cells of the permanent tissue is fairly at a lower rate.

The permanent tissue in plants mainly helps in providing support, protection as well as in photosynthesis and conduction of water, minerals, and nutrients. Permanent tissue cells may be living or dead.

Permanent tissue is differentiated into two types. 1 Simple Permanent tissue 2 Complex Permanent tissue, The simple permanent tissue is mainly classified into three types. Parenchyma Collenchyma Sclerenchyma
Parenchyma: Parenchyma is a type of permanent tissue. It consists of unspecialized cells with thin cell walls. The cells of this tissue are living. The cells are loosely packed, which forms large spaces between cells are called as intercellular spaces. The tissue provides support and also stores food.
The parenchyma also presents in another two different forms. Chlorenchyma Aerenchyma Chlorenchyma: The parenchyma tissue consisting of chlorophyll and performs photosynthesis are called as chlorenchyma. Aerenchyma: The parenchyma with large air cavities are called as aerenchyma. Aerenchyma provides buoyancy to the plants and helps them to float. The parenchyma tissue stores nutrients and water. Collenchyma: Collenchyma is another permanent tissue. The cells of this tissue are living, elongated and irregularly thickened at corners. It provides flexibility in plants without breaking.
It also provides mechanical support. The tissue is present below epidermis in leaf stalks.
Intercellular spaces are present. Sclerenchyma: Sclerenchyma is another type of permanent tissue.
The cells of this tissue are dead; hence the plant is hard and stiff. Ex: Husk of a coconut. The cells are long, narrow and thickened walls due to the presence of lignin. Intercellular spaces are absent in some conditions. It also provides strength to parts of the plant. The tissue is present in stems, in the veins of leaves, hard covering of seeds and nuts, and around vascular bundles.


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