Energy loss and heat gain need to balanced so that your body temperature remains constant
controlling body temperature requires:
Temperature receptors in the skin to detect the external temperature.
Temperature receptors in the brain to measure the temperature of the blood.
The brain which acts as a processing centre, to receive information from the temperature receptors, responding by triggering effectors.
effectors (sweat glands and muscles) to carry out the automatic response.
When too hot
If your body temperature is too high, heat needs to be trnsferred to the environment,.