11.   It holds that classes of animals like mammals maintain their core body temperatures at a relatively constant value.

12.   Saunas and hot tubs should be avoided because they raise the core body temperature to unacceptable levels.

13.   Kim and his colleagues used an infrared tympanic thermometer, which determines core body temperature by measuring the infrared radiation given off by the ear drum.

14.   Women were found to have a higher average core temperature than men, but research also showed that female subjects generally had colder hands than males.