The body's ability to maintain stable internal conditions despite changes in external environments is referred to as homeostasis. This regulatory process involves various physiological systems working in harmony to keep factors such as temperature, pH levels, and electrolyte balance within a narrow, optimal range. Homeostasis is critical for normal functioning and survival, allowing the body to adapt to environmental changes, such as fluctuations in temperature or hydration. Disruption in these processes can lead to adverse health effects, emphasizing the importance of homeostatic mechanisms in overall well-being.