Question

differences between parenchyma, sclernchyma and collenchyma​

Answer 1

$\mathfrak{Difference\;between\;parenchyma,Collenchyma\;and\;Sclerenchyma:}$

$\underline{\underline{\bold{Parenchyma:}}}$

• It consists of living cells.
• Intercellular spaces are usually present or may be absent.
• Cell wall is thin without having secondary deposition.
• Cells contain cytoplasm.
• They have vital functions like synthesis and storage of food.

$\underline{\underline{\bold{Collenchyma:}}}$

• It consists of living cells.
• Intercellular spaces are usually absent.
• Cell wall is thick as it has pectin deposition.
• Cells contain cytoplasm.
• They have both vital as well as mechanical functions , providing support and elasticity to the plant body.

$\underline{\underline{\bold{Sclerenchyma:}}}$

• It consists of dead cells.

• Cells are devoid of cytoplasm.

• Intercellular spaces are absent.

• Cell wall is thick as it has lignin deposition.

• It is chiefly a mechanical tissue.

Answer 2

$\underline{\underline{\bold{Parenchyma\:Tissue}}}$

$\boxed{Characteristics}$

• The cells with thin cell walls.

• They are live cells.

• They are usually loosely packed.

• Cells in this tissue may be of any shape; circular, hexagonal, pentagonal and oval etc.

• They have large intercellular spaces between cells.

$\boxed{Location}$

• It is present in soft part of the plant like flowers, green steam, fruits and leafs.

$\boxed{Function}$

• It acts as a storage of food.

• It fills spaces that is why it is it as a packing tissue.

$\underline{\underline{\bold{Collenchyma\:Tissue}}}$

$\boxed{Characteristics}$

• Cell wall is thick at the corner due to deposition of pectin.

• The cells of this tissue are living, elongated.

• There is very little intercellular space.

$\boxed{Location}$

• This tissue present in leaf stalks below the epidermis.

$\boxed{Function}$

• It provides flexibility in various parts of a plant leaf, stem etc.

• It also provided mechanical support to plants.

$\underline{\underline{\bold{Sclerenchyma\:Tissue}}}$

$\boxed{Characteristics}$

• This tissue has highly thick cell walls due to lignin.

• The cell of this tissues are dead.

• The cells are long and narrow.

• The cells has no intercellular spaces.

$\boxed{Location}$

• It is present in stems around vascular bundles, in the veins of leaf and in hard covering of seeds and nuts.

$\boxed{Function}$

• It makes the plant more hard and stiff.

• It provides mechanical strength to plants.