Body temperature refers to the normal internal body heat or warmth that is maintained by all living organisms. It is regulated by the hypothalamus, a part of the brain which controls homeostasis and maintains an optimal core temperature for the proper functioning of metabolic processes within cells.
In humans, the average resting body temperature is around 98.6°F (37°C), but it can vary throughout the day or due to illness. A fever occurs when the body temperature rises above its normal range, usually as a response to infection or inflammation. On the other hand, hypothermia occurs when the body temperature drops below the normal range, which can be life-threatening if not treated promptly.
Overall, body temperature is an important indicator of health and any deviation from the norm may signal a medical condition that requires attention.