define simple permanent tissue give example also pls
Answers
Answer:
simple parmanent tissue is made up of same type of tissue which look like each other
Explanation:
The tissues that are completely grown and has lost the ability of division are known as permanent tissues. The meristematic tissues divide and differentiate to form the permanent tissues.
Types of Permanent Tissue
Simple Permanent Tissue
These are also known as homogenous tissues. They are made up of a single cell type, usually with the same origin, structure, and function.
Simple permanent tissue is further classified into three types:
(Parenchyma)
*The cells have an oval or round shape.
*The cell wall is made up of hemicellulose or cellulose.
*The cell is thin-walled.
*The cells have vacuoles and very small nucleus.
*It is found in all parts of the plant.
*The protoplasm is living and dense.
(Collenchyma)
*Cells are long and thick walled.
*The cell wall is made up of cellulose and pectin.
*It is the only tissue with the highest refractive index due to the presence of pectin.
*It is found in hypodermis of dicot stem and the vascular bundle of dicot leaf.
*The amount of chloroplast is less in the cells.
*The cells have no intercellular spaces.
(Sclerenchyma)-
*These are dead tissues, very hard and rigid in texture.
*Cells are thick walled with various size and shapes.
*These provide mechanical support and rigidity to the plant.
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