Presentation On Presentation On PlantPlant

TissuesTissues

Group of cells having a common Group of cells having a common origin, similarorigin, similar

or related structure which work or related structure which work together totogether to

perform a common function is perform a common function is called tissue.called tissue.

Study of tissues is called histologyStudy of tissues is called histology

IMPORTANCE OF TISSUESIMPORTANCE OF TISSUES• Formation of tissues has brought about Formation of tissues has brought about divison of divison of

Labour in multicellular organismsLabour in multicellular organisms•Tissues become organised to form organs Tissues become organised to form organs &organ system&organ system•Workload of individual cells has decreasedWorkload of individual cells has decreased

Both plants and animals have similar Both plants and animals have similar life processes .However they do not have life processes .However they do not have similar types of tissues because of the similar types of tissues because of the differences in their organisation , mode of differences in their organisation , mode of living and lifestyle. Plants and animals are living and lifestyle. Plants and animals are not made of same type of tissues -not made of same type of tissues -Growth Growth Mobility Mobility Structural organisationStructural organisation

Plant tissuesPlant tissuesPlant tissues is of two types ,meristematic and Plant tissues is of two types ,meristematic and permanent plant tissues. Meristematic tissues is of permanent plant tissues. Meristematic tissues is of three types –three types –

Apical , Intercalary and Lateral MeristamApical , Intercalary and Lateral Meristam

Permanent tissues are of two types-Permanent tissues are of two types-

Simple permanent and complex permanent tissueSimple permanent and complex permanent tissue

Meristematic tissueMeristematic tissueIt is a plant tissue of thin walled It is a plant tissue of thin walled

compactly arrangedcompactly arranged

In mature cell that have the potential In mature cell that have the potential to divide and to divide and

From new cell . Meristematic tissue From new cell . Meristematic tissue is also called meristem. Its cells are is also called meristem. Its cells are

called meristematic cells .Thecalled meristematic cells .The

region where meristem is present can region where meristem is present can function as growth region. New cells function as growth region. New cells

produced by a meristemproduced by a meristem

Are initally like meristmatic cell . Are initally like meristmatic cell . Slowly they growSlowly they grow

Differentiate and mature into Differentiate and mature into component of variuscomponent of varius

Permanent tissues.Permanent tissues.

Permanent tissuePermanent tissueThey are plant tissue where the cells have lost the They are plant tissue where the cells have lost the

ability to ability to

divide and have assumed a permanent shape,size and divide and have assumed a permanent shape,size and function.function.

They are derived from meristematic cells. The They are derived from meristematic cells. The process of taking up a definite shape, size, structure process of taking up a definite shape, size, structure and function is called differentiation. Different types and function is called differentiation. Different types of permanent tissues are formed due to differences of permanent tissues are formed due to differences in their specialisation. Permanent tissue may be in their specialisation. Permanent tissue may be simple ,Complex or Special .their cells may beliving simple ,Complex or Special .their cells may beliving or dead, thin walled or thickWalled. Thickening may or dead, thin walled or thickWalled. Thickening may be regular or irregular be regular or irregular

Meristematic tissue Meristematic tissue Permanent tissuePermanent tissue