Human beings are warm blooded. Warm blooded means that human beings can keep the inside of their bodies at a constant temperature. In cool environment they generate their own heat. Human beings can sweat or pant to loose heat by water evaporation and they can also cool themselves by getting wet. For more information on the subject, visit the link below.
coolcosmos.ipac.caltech.edu
coolcosmos.ipac.caltech.edu
