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 | Class IX :
Biology | | | | Chapter: Tissues | |   Reader Friendly Format | | Pre-requisites | | | Whenever you see an organism without the aid of a microscope, you are actually looking at a macroscopic, multicellular being that goes about its day-to-day activities with perfect harmony. Like any other machine, the body of an organism, be it a plant or an animal, has many parts. Each part has a specific function to perform. For example, in a motor bike, certain parts work together to provide the electrical energy required for the lighting, some other parts help to generate the thrust for movement, and yet other parts to remove the exhaust fumes. Likewise, the body also has different parts called the organs, and even though each of them has a different function, they work together to carry out the life activities of an organism. Each and every organ is made of small groups of cells, which have a common origin, structure and function. Such groups of cells are called tissues.
- All organisms that are multicellular have tissues in their bodies.
(Explanation)
- Plant tissues are broadly classified into two categories:
1. meristematic 2. permanent.
(Explanation) - In plants, different tissues have different functions.
(Explanation)
- Animal tissues are classified into four different categories based on their structure and function/s.
(Explanation)
- All the tissues in the body work together to perform the life functions of multicellular organisms.
(Explanation)
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