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'''Heat''' is a form of energy that is transferred between systems or objects with different temperatures (from the higher temperature system to the lower temperature system). In the context of human physiology, heat is a critical factor in maintaining the body's homeostasis. == Overview == Heat is produced in the human body through various metabolic processes, and can also be absorbed from the environment. The body has several mechanisms to regulate its temperature and prevent overheating or hypothermia, such as sweating, shivering, and changes in blood flow. == Heat Production in the Body == The human body produces heat as a byproduct of [[metabolism]]. This is especially true during physical activity, when metabolic rates increase. The [[muscles]] are a major source of heat production, as they generate heat while contracting and relaxing. == Heat Regulation in the Body == The body regulates its temperature through a process known as [[thermoregulation]]. This involves a balance between heat production and heat loss. The [[hypothalamus]] in the brain acts as the body's thermostat, detecting changes in body temperature and triggering responses to increase or decrease heat production or loss as needed. == Heat-Related Illnesses == Exposure to high temperatures or strenuous physical activity in hot conditions can lead to heat-related illnesses. These include [[heat stroke]], [[heat exhaustion]], and [[heat cramps]]. These conditions can be serious or even life-threatening, and require immediate medical attention. == See Also == * [[Thermoregulation]] * [[Metabolism]] * [[Hypothalamus]] * [[Heat stroke]] * [[Heat exhaustion]] * [[Heat cramps]] [[Category:Physiology]] [[Category:Thermodynamics]] [[Category:Medical terms]] {{stub}} {{dictionary-stub1}} <gallery> File:Glowing_metal.jpg|Glowing metal File:Portrait_of_Galileo_Galilei.jpg|Portrait of Galileo Galilei File:John_Locke._Portrait_by_Herman_Verelst_(cropped).jpg|John Locke. Portrait by Herman Verelst File:Brook_Taylor_(cropped).jpg|Brook Taylor File:William_Cullen_(cropped).jpg|William Cullen File:Black_Joseph_(cropped).jpg|Black Joseph File:Ice_calorimeter_(cropped).jpg|Ice calorimeter File:Hot_metalwork.jpg|Hot metalwork File:Black_Joseph.jpg|Black Joseph File:Clausius-1.jpg|Clausius </gallery>
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