Name three types of simple permanent tissue and differentiate between them.
Answers
Explanation:
Simple permanent tissues are again classified into three main types. They are parenchyma, collenchyma, and sclerenchyma.
Parenchyma – The cells of this tissue are living, with thin cell walls. Cells can be oval or round in shape. They have a large central vacuole and a dense cytoplasm. The parenchyma tissue is located in the soft parts of the plant such as cortex and pith. It mainly acts as a packing tissue, providing mechanical support. It also helps in the storage of food. Based on the specific functions, parenchyma can be further classified into Aerenchyma and Chlorenchyma.
Collenchyma – These cells are living cells and have an elongated shape. The corners of the cell wall are thickened. There is very little intercellular space present. The collenchyma tissue can be located in the leaf stalks, below the epidermis etc. Its main function is to provide flexibility to the plants as well as mechanical support.
Sclerenchyma – The cells of the sclerenchyma tissue are dead. The cell wall is very thick due to the deposition of lignin. The cells of this tissue can be in different shapes and sizes. They are generally located in the leaf veins, hard coverings of the seeds and can also be found surrounding the vascular bundle. The main function of the sclerenchymatic tissue is to provide rigidity and mechanical support to the plant body. They also make the plant stiff and hard.
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Answer:
permanent tissues are a group of living and dead cells which are formed by meristematic that have lost their ability to divide.
that is these tissues have undergone differentiation and are incapable of meristematic activities.
It is of two types
- simple permanent tissue
- complex permanent tissue
simple permanent tissues are group of cells which are similar in origin structure and function.
They are of three types:
- parenchyma- are unspecialised living cells which have thin cell walls and are loosely packed so that the intercellular spaces are found between cell of this tissue
its main function is to support and protect the plants and store food.
2. collenchyma- are living tissue which also have thin walled cells but possess thickening of cellulose water and pectin substances at the corners of the cells.
its main function is to provide mechanical support, elasticy, and tensile strength to the plants.
3. sclerenchyma- are tissues consists of thick walled and dead cells
the cells have hard and thick walls because of lingin deposition.
it provides mechanical stiffness and strength.
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