Changes

http://everythingscience.co.za/lifesciences/grade-10/04-plant-and-animal-tissues/images/6d29e2ef912af90a6d0451f417787577.png<br>

http://everythingscience.co.za/lifesciences/grade-10/04-plant-and-animal-tissues/images/6d29e2ef912af90a6d0451f417787577.png<br>

SCLERENCHYMA:<br>

SCLERENCHYMA:<br>

Sclerenchyma is the tissue which makes the plant hard and stiff. We have seen the husk of a coconut. It is made of sclerenchymatous tissue. The cells of this tissue are dead. They are long and narrow as the walls are thickened due to lignin (a chemical substance which acts as cement andhardens them). Often these walls are so thick that there is no internal space inside the cell. This tissue is present in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts. It provides strength to the plant parts.<br>

Sclerenchyma is the tissue which makes the plant hard and stiff. We have seen the husk of a coconut. It is made of sclerenchymatous tissue. The cells of this tissue are dead. They are long and narrow as the walls are thickened due to lignin (a chemical substance which acts as cement andhardens them). Often these walls are so thick that there is no internal space inside the cell. This tissue is present in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts. It provides strength to the plant parts.<br>

The cell wall of sclerenchyma cells in plants like jute and hemp contain elongated, thread like thick walled cells called fibres.Since fibres are flexible and elastic they are used in coir industries to make gunny bags and ropes.

The cell wall of sclerenchyma cells in plants like jute and hemp contain elongated, thread like thick walled cells called fibres.Since fibres are flexible and elastic they are used in coir industries to make gunny bags and ropes.<br>

===Activities===

===Activities===