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The human body is composed of cells, organs, organ systems, and tissues. How are these organized? A) Groups of cells form tissues. B) Groups of organs form tissues. C) Groups of organ systems form tissues. D) Groups of tissues form organ systems.

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articunojaz
The answer to this is A because groups of cells do form tissues. 
kadynellison

The answer is groups of cells form tissues because the units of the body are cells, tissue, organ, and organ system. The answer is A.

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