Question

difference between parenchyma and collenchyma​

Answer 1

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❶❭ $\color{red}{Parenchyma}$

● 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❭ $\color{red}{Collenchyma}$

● 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.

Answer 2

PARENCHYMA

• Parenchyma is an unspecialised simple permanent tissue.
• Their shape may be oval, round, polygonal or elongated in shape.
• They have thin cell wall made of cellulose.
• They have large intracellular spaces between them.
• They have neucleus in their cell and hence living.
• They are present in plant's roots, stems, leaves, flowers or fruits.

COLLENCHYMA

• Collenchyma is an specialised simple permanent tissue.
• Their shape may be transversed or longitudnal.
• They have thick wall with deposits of hemicellulose, and pectin.
• They have less intracellular spaces between them.
• They have neucleus in their cell and are living.
• It is found below epidermis of leaf stalk and leaf mid-ribs.