A metabolic network is a complex system of interconnected biochemical reactions that occur within a cell. These reactions involve various molecules, such as enzymes, substrates, and products, which work together to convert nutrients into energy and building blocks for cellular functions. The network is essential for maintaining life, as it regulates processes like cellular respiration and photosynthesis. Metabolic networks can be visualized as a series of pathways, where each pathway represents a specific sequence of reactions. Understanding these networks helps scientists study how cells respond to changes in their environment and can lead to advancements in fields like biotechnology and medicine.