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metabolism
The combination of biochemical processes by which energy, obtained from an external source, is harnessed to maintain internal order and a state of chemical disequilibrium. It includes all of the chemosynthetic (anabolic) and degradative (catabolic) reactions that take place in living organisms. The ability to metabolize is generally considered to be one of the fundamental characteristics of life (see life, nature).
Related category
• ANATOMY AND PHYSIOLOGY
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