Infinity: If you remember your basic anatomy, cells are the smallest parts of the human body and there are possibly millions and millions. These combine into tissues which combine into structures like muscles, bones, nerves, arteries, veins, fat, etc. Any given structure in the body is surrounded 360 degrees by other cells, tissues and organs. While some have specific names, there are many more that don't.
Answered 11/28/2013
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