Define Meristimatic tissue , Permanent tissue , Epidermal tissue. class 9
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Answer:
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Explanation:
Meristematic tissues are responsible for growth in plants. Cells in these tissues can divide and form new cells.
Meristematic tissues are of three types:
(i) Apical Meristem: It is present at the growing tip of the stem and roots and increases the length. .
(ii) Lateral Meristem (cambium): It is present beneath the bark. It is responsible for growth in girth of trunk.
(iii) Intercalary Meristem: It is present at internodes or base of the leaves and increases the length between the nodes.
Location of Meristematic Tissue in Plant Body
B. Permanent Tissue
Cells of meristematic tissues change their shape & size to get specialised in performing other functions in plants body. This process is called Differentiation.
Once the cells of meristematic tissue divide to a certain extent, they become specialized for a particular function.
Permanent tissues are of two types:
Simple tissues and Complex tissues
(i) Simple tissues: This type of tissue is composed of same type of cells.
These are again of four types:
(a) Parenchyma simple tissues: Cells of parenchyma tissues are live. They are oval, elongated and loosely packed with large inter-cellular space, forming basic packing of tissue and are found throughout the plant body.
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