Body Core Temperature

 https://www.sciencedirect.com/topics/nursing-and-health-professions/core-temperature 

Core temperature refers to the internal temperature of the body's vital organs, typically ranging from 36.5 to 37.5 °C (97.7 to 99.5 °F). It is crucial for maintaining bodily functions and can fluctuate based on various factors like time of day, activity level, and health status. https://duckduckgo.com/?q=core+temperature&ia=web&assist=true 

https://duckduckgo.com/?q=core+temperature&ia=web&assist=true 

https://med.libretexts.org/Bookshelves/Allied_Health/Vital_Sign_Measurement_Across_the_Lifespan_(Lapum_et_al.)/02%3A_Temperature/2.16%3A_What_are_Normal_Temperature_Ranges 

https://en.wikipedia.org/wiki/Thermoregulation

https://en.wikipedia.org/wiki/Afterdrop