Neologism contributed by the 19th-century German naturalist Friedrich Theodor Schwann from the Greek metabole, change, process, transformation, goal (in the middle of) and ballo (throw, throw). Set of physical-chemical processes of the cells of living beings to perform various functions such as feeding, growing, reproducing or reacting to the environment. In the cell is the basis of life, so in biology classes could never miss the prototype image of the cell. I was always struck by mitochondria.
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