Sum total of chemical reactions taking place in cells of the living organisms. All metabolic changes that take place in a form of multiple reactions and this follows a particular pathway called the metabolic pathway.
Pathways involve the extraction of energy by breaking down molecules and the energy is used to synthesize the building blocks. The process of metabolism occurs in two phases, namely anabolism and catabolism. The pathway in which a complex molecule is produced from simple molecules is called an anabolic pathway. For example, amino acids become proteins. The catabolic pathway is another metabolic pathway.