NOTES( NUMBER 2)
CHAPTER 6 TISSUE
A group of cells similar in structure that work together to
perform a particular function forms a tissue.
Tissues become organized to form organs and organs into
organ systems.
Tissues of Plants and Animals
Plant Tissues Animal Tissues
1)Plants do not move so their tissues are 1)Animals need more energy as
predominantly the ones that provide compared to plants because they are
support to them so that they can stand not stationary. Their tissues are the
erect. ones that can support movement.
2)These tissues are made up of dead cells 2)The tissues in case of animals are
because dead cells can also provide made up of living cells so that they
mechanical strength to the plants and do can move and perform several
not require much maintenance. functions.
3)Cells in animals grow uniformly and
3)Only certain parts of the plant can grow. not only in certain regions of the
body.
4)The structure of plant tissues is not very 4)The organs and organ systems in
specialized as compared to animals animals are highly specialized.
,Plant Tissue
.
MERISTEMATIC TISSUE
Only certain parts of a plant tend to grow. The tissues located
in such parts are called meristematic tissues
They have the capability to divide themselves and form new
tissues.
-----They have thin cell wall made of cellulose.
----have dense nucleus and cytoplasm but lack vacuoles.
They can further be classified differently based on the areas of
the plants where they are located -
1) Apical meristem
, 2) Lateral meristem
3) Intercalary meristem
Location of meristematic tissue
Apical Meristem Lateral Meristem Intercalary Meristem
LOCATION LOCATION
LOCATION
They are present along the They are located at the
They are present at
lateral side of the stems and base of leaves or on
the growing tips of the
roots. For example: cork either side of nodes
roots and stems.
cambium. (internodes ).
FUNCTION
FUNCTION FUNCTION
Increases length of the
It increase diameter / girth It increases the length
stem and root
of stem or root . leaves and internodes.
Why there are no vacuoles in the meristem cells
CHAPTER 6 TISSUE
A group of cells similar in structure that work together to
perform a particular function forms a tissue.
Tissues become organized to form organs and organs into
organ systems.
Tissues of Plants and Animals
Plant Tissues Animal Tissues
1)Plants do not move so their tissues are 1)Animals need more energy as
predominantly the ones that provide compared to plants because they are
support to them so that they can stand not stationary. Their tissues are the
erect. ones that can support movement.
2)These tissues are made up of dead cells 2)The tissues in case of animals are
because dead cells can also provide made up of living cells so that they
mechanical strength to the plants and do can move and perform several
not require much maintenance. functions.
3)Cells in animals grow uniformly and
3)Only certain parts of the plant can grow. not only in certain regions of the
body.
4)The structure of plant tissues is not very 4)The organs and organ systems in
specialized as compared to animals animals are highly specialized.
,Plant Tissue
.
MERISTEMATIC TISSUE
Only certain parts of a plant tend to grow. The tissues located
in such parts are called meristematic tissues
They have the capability to divide themselves and form new
tissues.
-----They have thin cell wall made of cellulose.
----have dense nucleus and cytoplasm but lack vacuoles.
They can further be classified differently based on the areas of
the plants where they are located -
1) Apical meristem
, 2) Lateral meristem
3) Intercalary meristem
Location of meristematic tissue
Apical Meristem Lateral Meristem Intercalary Meristem
LOCATION LOCATION
LOCATION
They are present along the They are located at the
They are present at
lateral side of the stems and base of leaves or on
the growing tips of the
roots. For example: cork either side of nodes
roots and stems.
cambium. (internodes ).
FUNCTION
FUNCTION FUNCTION
Increases length of the
It increase diameter / girth It increases the length
stem and root
of stem or root . leaves and internodes.
Why there are no vacuoles in the meristem cells
