Question

Diff between parenchyma,collenchyma and sclerenchyma

Answer 1

Hey mate!
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Parenchyma

1).Cell wall of parenchyma constitutes of cellulose.
2).Cell wall in parenchyma is pretty slim.
3).It is made up of living cells.

Collenchyma

1).Cell wall of collenchyma constitutes of hemicellulose and pectin
2).Cell wall of collenchyma is pretty dense.
3).it is made up of living cells.

Sclerenchyma

1).Cell wall of sclerenchyma constitutes of lignin.
2).Cell wall of sclerenchyma is also pretty dense.
3).The grown cells in sclerenchyma are dead

Hope it helps you!

Answer 2

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I.PARENCHYMA

A few layers of cell form a basic packing tissue . They are present in cortex and pith of stems and roots in the mesophyll of leaves .

Characteristics :-

>These are simple living cells with little specialisation and thin cell wall . .

>Cells are loosely packed with large species with them .

Functions :-

➡️It serves as a food storage tissue .

➡️This tissue provide support to the plant .

➡️When the parenchyma cell contains chlorophyll in some situations , it performs photosynthesis . Such type of parenchyma tissue is called Chlorenchyma .

➡️In aquatic plants , there is large air cavities present in parenchyma cells . Such type of parenchyma is called Aerenchyma.

➡️ Parenchyma of stems and roots also stores nutrients and water .

II .COLLENCHYMA

This tissue is generally found in the leaf stalks below the epidermis and leaf midribs.

Characteristics:-

>Cells are living , elongated and irregularly thickened at the corners due to the deposition of pectin .

>They have very little intercellular spaces.

Functions:-

➡️It provides mechanical support and elasticity to plants.

➡️It's also allows easy bending in various parts of the plant without breaking.

III. SCLERENCHYMA

This type of tissue is present in stems , around vascular bundles , in the veins of leaves and in the hard covering of seeds and nuts.

Characteristics:-

>These cells of sclerenchyma tissue are dead.

>These cells are long and narrow in appearance.

>Cell walls are thickened due to Lignin . ( a chemical substance ) deposition , which acts as cement and hardness them .

>Due to the presence of thick walls , there is no internal space between the cells .

Functions:-

➡️It is known to the cheif mechanical tissue , which makes the plant hard and stiff .

➡️It forms protective covering around seeds and nuts.

➡️It gives rigidity , flexibility and elasticity to the plant body.