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How does sweating help lower body temperature?
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human body
Vintage anatomy charts of the human body showing the skeletal and muscle systems.
Sweating is a vital mechanism for homeostasis, the process by which the human body maintains a stable internal environment. When the body's temperature rises, the sympathetic nervous system triggers the eccrine sweat glands to secrete a water-based solution onto the surface of the skin.12
The cooling effect occurs through evaporation. As the liquid sweat transitions into vapor, it absorbs heat from the body, effectively dissipating thermal energy and lowering the body's core temperature. This process is a primary method of heat regulation, allowing humans to maintain an optimal internal temperature of approximately 37 °C (98.6 °F) even when exposed to external heat or increased metabolic activity.21