summary of tissues class 9th ncert
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@Charlie16.
1. Tissue is a group of cells having similar origin, structure & function. Study of tissues is
called Histology
2. In unicellular organism (Amoeba), single cell performs all basic functions, whereas in
multi-cellular organisms (Plants and Animals) shows division of labour as Plant tissue &
Animal tissues.
3. Plant tissues are two types: Meristems & Permanent tissues.
4. Meristems: The Meristems are the tissues having the power of cell division. It is found on
those region of the plant which grows.
Types of Meristems;
1. The Apical meristems – It is present at the growing tip of the stem and roots and
increases the length.
2. The lateral meristems - present at the lateral side of stem anf root (cambium) and
increases the girth.
3. The intercalary meristems - present at internodes or base of the leaves and increases the
length between the nodes.
Permanent tissues: Two types such as Simple permanent tissues & Complex permanent
tissues.
a) Simple permanent tissues: subdivided as
(i): Parenchyma: Tissues provide the support to plants.They are loosly packed and has large
intracellular space.
Parenchyma with chlorophyll which performs photosynthesis is called as1. Tissue is a group of cells having similar origin, structure & function. Study of tissues is
called Histology
2. In unicellular organism (Amoeba), single cell performs all basic functions, whereas in
multi-cellular organisms (Plants and Animals) shows division of labour as Plant tissue &
Animal tissues.
3. Plant tissues are two types: Meristems & Permanent tissues.
4. Meristems: The Meristems are the tissues having the power of cell division. It is found on
those region of the plant which grows.
Types of Meristems;
1. The Apical meristems – It is present at the growing tip of the stem and roots and
increases the length.
2. The lateral meristems - present at the lateral side of stem anf root (cambium) and
increases the girth.
3. The intercalary meristems - present at internodes or base of the leaves and increases the
length between the nodes.
Permanent tissues: Two types such as Simple permanent tissues & Complex permanent
tissues.
a) Simple permanent tissues: subdivided as
(i): Parenchyma: Tissues provide the support to plants.They are loosly packed and has large
intracellular space.
Parenchyma with chlorophyll which performs photosynthesis is called as1. Tissue is a group of cells having similar origin, structure & function. Study of tissues is
called Histology
2. In unicellular organism (Amoeba), single cell performs all basic functions, whereas in
multi-cellular organisms (Plants and Animals) shows division of labour as Plant tissue &
Animal tissues.
3. Plant tissues are two types: Meristems & Permanent tissues.
4. Meristems: The Meristems are the tissues having the power of cell division. It is found on
those region of the plant which grows.
Types of Meristems;
1. The Apical meristems – It is present at the growing tip of the stem and roots and
increases the length.
2. The lateral meristems - present at the lateral side of stem anf root (cambium) and
increases the girth.
3. The intercalary meristems - present at internodes or base of the leaves and increases the
length between the nodes.
Permanent tissues: Two types such as Simple permanent tissues & Complex permanent
tissues.
a) Simple permanent tissues: subdivided as
(i): Parenchyma: Tissues provide the support to plants.They are loosly packed and has large
intracellular space.
Parenchyma with chlorophyll which performs photosynthesis is called as