The cells in your body work in groups, and each group has specific functions and structures. They also communicate by sending out signals so that cells can act together as a group. If you take a piece of living tissue and move it to a different place on the body that has similar function and structure, the cells will signal to each other that they need to heal together since both places have been hurt by being sliced open. The cells in the blood make a temporary bond while the cells in the tissues make new proteins and cells to bridge the gap.
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