Using two examples from different body systems (e.g., humans are multicellular organisms) explain the different levels of cell organization within those systems.

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Body systems work together to provide the functions of life to human organisms. The organism is the most complex level of organization. The levels below it, in descending order, are organ systems, organs, tissues, and cells.

The cell is often called the building block of life. Cells perform different functions in different areas of the body. Cells can work together to form tissues. Two or more...

(The entire section contains 194 words.)

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