. "Metabolism (from Greek: \u03BC\u03B5\u03C4\u03B1\u03B2\u03BF\u03BB\u03AE metabol\u0113, \"change\") is the set of life-sustaining chemical transformations within the cells of living organisms. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments."@en . .