what is the core internal temperature
core temÂ·perÂ·aÂ·ture. The temperature of the interior of the body. is normally regulated so as to maintain a core temperature, that of the blood and the internal organs, of 37Â°C Â± 0.5-1Â°C.ormal Body Temperature. Body temperature is usually measured by a thermometer placed in the mouth, the rectum, or the auditory canal (for tympanic membrane temperature). The normal oral temperature is 37Â° Celsius (98.6Â° Fahrenheit); rectally, it is 37.3Â° Celsius (99.2Â° Fahrenheit).