Many-celled organisms' tissue is made of cells that are similar in structure and function, working together to perform a specific task.

Here's a breakdown:

* Cells: The basic building blocks of all living things.

* Tissue: A group of similar cells that work together to perform a specific function.

* Organ: A structure made of different tissues that work together to perform a more complex function.

* Organ System: A group of organs that work together to perform a major body function.

* Organism: A complete living thing made up of organ systems.

For example, muscle tissue is made of muscle cells that can contract and relax, allowing for movement. Nervous tissue is made of nerve cells that transmit signals throughout the body.

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