KERALA UNIVERSITY

COLLEGE OF TEACHER

EDUCATION

NEDUMANGAD

2013-2014ARYA RAJ J

NATURAL SCIENCE

PLANT TISSUES

SIMPLE

TISSUES

COMPLEX

TISSUES

SIMPLE TISSUESIt is a type of permanent tissue. Which is

made up of one type of cells. It is homogenous nature. These are classified into

*Parenchyma

*Collenchyma

*Sclerenchyma

PARENCHYMA

• It is a living thin walled

simple permanent tissue.

• Parenchyma cells are

isodiametric and oval in shape.

• The cells is made up of

cellulose.

FUNCTIONS OF PARENCHYMA

• It store the food materials.

• It give rigidity to the plant body

based on the

turgidity condition of the cell.

• In fleshy stem of parenchyma

cells store water.

PARENCHYMA

COLLENCHYMA• It is a living thick-walled

simple permanent tissue.

• it is closely related to

parenchyma.

• The parenchyma cells has

a thickening. These

Thickening usually occurs

at the corners or angles

of the cells.

FUNCTIONS OF

COLLENCHYMA• It give mechanical support to the

plant organ.

• It help the plant to the bending and streching caused by wind.

CO

LLEN

CH

YM

A

SCLERENCHYMA• It is a dead thick

walled simple permanent tissue.

• It is composed of elongated or non-elongated cells which lack protoplasm.

• The cells walls are lignified and pitted.

FUNCTIONS OF

SCLERENCHYMA• It give mechanical support to the plant

body.

• It protect the plant from various strains and stresses of environmental forces.

• Fibres of fruits and seeds help in their dispersal by wind.

COMPLEX TISSUES• It is a type of

permanent tissue, which is composed of different types of cells.

• It is homogenous nature.

• Xylem and phloem are complex tissues found in vascular plants.

XYLEM• Xylem is a complex

conductive tissue,

conducting water and minerals elements from the root to other part of the plant.

• It also serves as mechanical tissue.

• Xylem is otherwise called wood.

XYLEM

PHLOEM• Phloem is a complex

conductive tissueconducting prepared food materials from the region of their synthesis to all other part of the plant.

• Phloem is otherwise called bast.

PH

LO

EM