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| Biology of Cells, Tissues, Organs, Organ Systems, And Organisms |
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A tissue is a family of cells that live very close together, and work hard to do the same jobs. Many tissues come together to form what biologists call an organ. This is like a city in the example above. Organs then work together to form a system, and eventually the entire body of a life form. |
In a way, your body is functioning as a mini-planet. Right now within your body, there are billions of individual cells working hard in specialized jobs. These cells join into tissues, organs, and systems and help make up a vast community of life within you. |
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