The normal body temperature refers to the typical range of internal body temperature considered healthy and stable for humans. It is generally measured orally (by mouth) and falls within the range of 97.8°F to 99.1°F (36.5°C to 37.3°C). Variations can occur depending on factors such as time of day, activity level, and age, but a normal body temperature indicates that the body’s thermoregulatory system is functioning properly to maintain homeostasis.