Metabolizma, or metabolism, refers to the complex set of chemical reactions that occur within living organisms to maintain life. It involves converting food into energy, which is essential for growth, reproduction, and maintaining cellular functions. Metabolism can be divided into two main processes: katabolizma, which breaks down molecules to release energy, and anabolizma, which uses energy to build complex molecules. The rate of metabolism can vary between individuals and is influenced by factors such as age, gender, and physical activity. A higher metabolic rate means the body burns calories more quickly, while a lower rate results in slower energy expenditure. Understanding metabolism is crucial for managing weight and overall health.