A biological system refers to a complex network of interacting components that work together to sustain life. These systems can range from small-scale structures, like cells, to larger systems, such as organs and entire organisms. Each component, including proteins, genes, and cells, plays a specific role in maintaining the overall function and health of the system. Biological systems are characterized by their ability to adapt and respond to changes in their environment. They rely on various processes, such as metabolism and homeostasis, to regulate internal conditions and ensure survival. Understanding these systems is crucial for fields like biology, medicine, and ecology.