Question

differentiate between parenchyma,collenchyma,sclerenchyma on the basis of arrangement of the cells (not cell wall)​

Answer 1

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Parenchyma:They are made up of thin walled living cells

Collenchyma :They are made up of thick walled living cells with thickening at the corners of the cells

Sclerenchyma: They are made up of thick walled elongated dead cells

Answer 2

PARENCHYMA

Meaning:

The living plant cells are originating from ground and protoderm meristem. These type of cells are most abundantly found in plants tissue.

Found in :

These type of cells are present in every soft part of the plant.

Type of cell:

Unspecialized and living cells.

Cell Shape :

There are various shapes of the cells, but generally, they are isodiametric.

Intercellular space between the cells :Present.

Function:

Parenchyma cells help in storage of foods, in gaseous exchange, and in photosynthesis.

COLLENCHYMA

Meaning:

The type of living plant cells originating from the pro-cambium. The epidermal layers of the plant are made of collenchyma cell.

Found in :

These cells are found in specific part of the plant like leaves, stems, and petioles.

Type of cell:

Specialized cells and living cells

Cell shape:

Elongated cells are present.

Intercellular space between the cells

:Less space is present between the cells.

Function

:

Collenchyma cells provide mechanical support and elasticity to the plant.

SCLERENCHYMA

Meaning:

The hard and outer part of the stem is made up of the sclerenchyma cells. These are the dead plant cells which originate from ground meristem and protoderm procambium

Found in :

It is found in mature parts of the plants or trees.

Type of cell:

Specialized, matured and dead cells.

Cell Shape:

Sclereids, elongated and fibre shape.

Intercellular space between the cells :

Absent and so cells are tightly packed.

Function:

Sclerenchyma cells provide mechanical support to the plant. It also supports transportation of water and nutrients to the plants.