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Human beings possess a remarkable capacity to survive and function in extreme hot environments through a series of acclimatory adjustments. Acclimatization refers to the reversible physiological, biochemical, and behavioral modifications that develop in response to prolonged exposure to high environmental temperatures. These changes enable the body to maintain thermal balance, prevent heat-related illnesses, and sustain physical performance. In physical anthropology, the study of human acclimatization helps explain the interaction between biological adaptation and environmental stress. The human body maintains a core temperature of approximately 37°C through thermoregulation, controlled primarily by the hypothalamus. In extremely hot conditions, excess heat is dissipated through radiation, convection, conduction, and evaporation. Among these mechanisms, evaporation of sweat becomes the _________ _______ ______ _________ ________ ________ _______ __________ __________ __________ _____.
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