Feedback loops are essential in maintaining homeostasis within biological systems. They act as regulatory mechanisms, where a change in a system triggers actions to counteract that change. There are two types: positive feedback loops, which amplify changes (e.g., during childbirth), and negative feedback loops, which reduce changes (e.g., regulating body temperature). By continuously adjusting physiological processes, feedback loops ensure that internal conditions remain stable, enabling organisms to function efficiently regardless of external environmental fluctuations.