, BIOLOGY TISSUES
Tissues
Levels of Organisation
• A cell is the basic structural and functional unit of a living organism. Example: Nerve cell
Cell
• A tissue is a group of cells having a common origin, similar structure and function and held
together by a cementing substance. Example: Connective tissue
Tissue
• Different types of tissues working together and contributing to specific functions inside the
body constitute an organ. Example: Stomach
Organ
• Different organs coordinate to perform a specific life process and form an organ system.
Organ Example: Digestive system
system
• Various organ systems working simultaneously together constitute an organism.
Example: Plants
Organism
Differences between Plant and Animal Tissues
PLANT TISSUES ANIMAL TISSUES
1. Dead supportive tissues are more 1. Living supportive tissues are more
abundant as compared to living abundant as compared to dead
tissues. tissues.
2. Require less maintenance energy. 2. Require more maintenance energy.
3. Differentiation of meristematic and 3. No differentiation of meristematic and
permanent tissues. permanent tissues.
4. Organisation is simple. 4. Organisation is relatively complex.
5. Tissue organisation is meant for 5. Tissue organisation is meant for high
stationary habit of plants. mobility of animals.
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Tissues
Levels of Organisation
• A cell is the basic structural and functional unit of a living organism. Example: Nerve cell
Cell
• A tissue is a group of cells having a common origin, similar structure and function and held
together by a cementing substance. Example: Connective tissue
Tissue
• Different types of tissues working together and contributing to specific functions inside the
body constitute an organ. Example: Stomach
Organ
• Different organs coordinate to perform a specific life process and form an organ system.
Organ Example: Digestive system
system
• Various organ systems working simultaneously together constitute an organism.
Example: Plants
Organism
Differences between Plant and Animal Tissues
PLANT TISSUES ANIMAL TISSUES
1. Dead supportive tissues are more 1. Living supportive tissues are more
abundant as compared to living abundant as compared to dead
tissues. tissues.
2. Require less maintenance energy. 2. Require more maintenance energy.
3. Differentiation of meristematic and 3. No differentiation of meristematic and
permanent tissues. permanent tissues.
4. Organisation is simple. 4. Organisation is relatively complex.
5. Tissue organisation is meant for 5. Tissue organisation is meant for high
stationary habit of plants. mobility of animals.
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