tissue

CLASS9 SCIENCE BIOLOGY
CH2 TISSUE


NOTES


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>Main topics covered in Science, Tissues: Chapter Notes, are:

 Definition of Tissues

 Plant Tissues
 Meristematic Tissues and Their Types
 Permanent Tissues and Their Types

 ANIMAL TISSUE
 Epithelial tissue and its types
 Connective tissue and its types
 Muscular tissue and its type
 Nervous tissue

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Tissue
A group of cells that are specialized to perform a particular function forms a
tissue.

Tissues are mainly classified into two types:
1.Plant Tissues 2. Animal Tissues


1.Plant tissues
→ Plants do not move, i.e., they are stationary.

→ Most of the tissues they have are supportive, which provides them with
structural strength.

, → Most of these tissues are dead, as they can provide better mechanical
strength than the live ones, and need less maintenance.

→ Some of the plant tissues keep on dividing throughout the plant life.
These tissues are localised in certain regions.

Types of Plant Tissues:
Based on the dividing capacity of the tissues, various plant tissues can be
classified as growing or meristematic tissue and permanent tissue which
have further sub-divisions as explained below: