Nucleus
The nucleus is found in the center of the cell, so you could say it is the center of all living things. The nucleus is surrounded by a double membrane. Chromosomes are found inside the nucleus and it is surrounded by cytoplasm. The nucleus controls everything the cell does. (http://biology.about.com/od/cellanatomy/p/nucleus.htm) (http://www.biology4kids.com/files/cell_nucleus.html)
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