Heat loss

This comes from:

• Skin / blood vessels
  • Sweat is evapourated from the skin surface, the heat needed to do this is removed from the body.
  • When you get hotter the blood vessels near the surface open (become redder) so more heat is lost.
• From the lungs warm air is expired
• From urine and faeces - small amount of heat loss

The overall temperature is regulated by the hypothalamus in the brain.