Question

Types of Simple permanent Tissue? Explain

Answer 1

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➧ Types 0f Simple Permanent Tissues are:-▬▬▬▬▬▬▬▬▬▬▬▬▬⤵

❶❭ Parenchyma:-┅┅┉┅┅┉┅┅┉┅┅┉┅┅┉┅☟

● The unspecialised living plant tissue formed of thin walled rounded cell.

● This cell are isodiametric & least specialised.

● It is considered at the fundamental tissue or ground tissue.

➧ It's Characteristics are:-━━━━━━━━━━━━━━━━━━☟

❱ Cells are living cells with thin cell wall of cellulose.

❱ They are rounded, oval or polygonal in shape with intercellular spaces.

❱ Cytoplasm is dense with one large or more than one small vehicles.

➧ It's Functions are:-━━━━━━━━━━━━━━━━━━☟

❱ It form the ground tissue or packing tissue in plants.

❱ It provide rigidity to the plant by keeping cell rigid.

❱ It's cell store food.

❱ It helps in wound healing, regeneration & grafting.

❱ It cells are allow to exchange of respiratory gases.

❷❭ Collenchyma:- ┅┅┉┅┅┉┅┅┉┅┅┉┅┅┉┅☟

● It is found in steam leaf, leaf stalk & leave midribs of dicot herbaceous plant.

● It forms a layer below the epidermis called hypodermis.

● It is absent in monocot stem.

➧ It's Characteristics are:-━━━━━━━━━━━━━━━━━━☟

❱ Cells are living unfairly elongated.

❱ They appear polygonal, 0val or circular in cross-section.

❱ Cells surrounded by thik primary cell wall alone.

❱ The cell wall is thickened along the corner due to the deposition of cellulose & pectin.

❱ The cytoplasm has a large central vacuole.

➧ It's Functions are:-━━━━━━━━━━━━━━━━━━☟

❱ It provide mechanical support to the delicate developing organs of herbaceous Dicot stem.

❱ It cells combine both tensile strength & flexibility.

❱ It cells with chloroplast carrying out photosynthesis.

❱ This cell also store food & allow growth & elongation of 0rgan.

❸❭ Scelerenchyma :- ┅┅┉┅┅┉┅┅┉┅┅┉┅┅┉┅☟

● It is a hard supporting tissue formed of long, narrow & pointed ends.

● It occurs in root stem, leaves & petiole.

● These cells are dead with thick lignified walls that gradually lose Protoplasm.

➧ It's Characteristics are:-━━━━━━━━━━━━━━━━━━☟

❱ These are dead cell without nucleus & cytoplasm.

❱ Their cell wall is formed of cellulose & hemi-cellulose.

❱ It is thickened due to the secondary the position of Lignin.

❱ Lignin act as a cement & hardens the cell wall.

❱ The lignified cell wall has pits.

➧ It's Functions are:-━━━━━━━━━━━━━━━━━━☟

❱ It provide most of the support in a plant.

❱ To compressive & tensile stresses in plants.

❱ It allows the organs to withstand bending, shearing & compression.

❱ It's cells provide protective, vascular & supportive functions.

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Answer 2

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☀There are three types of Simple Permanent Tissue :-

➡1. 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.


➡2. 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.


➡3. 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.