How does your body help maintain homeostasis when you are cold or hot?

The body detects changes to temperature in two ways: receptors in the skin monitor for changes to external temperature; while the hypothalamus detects changes internally. It does this by monitoring the temperature of the blood as it passes this part of the brain. Feedback systems then respond to these changes in temperature: * too HOT:- # Vasodilation increases the amount of heat energy in our capillaries that reside close to the epidermis, which can then be lost by radiation. # Sweating is another method to keep us cool. The sweat evaporates using the energy from the body. * too COLD:- # Vasoconstriction occurs to reduce heat lost by radiation. # Hairs on our skin stand upright ; this traps a layer of air close to our skin, which is a good insulator. # Shivering generates heat energy from our muscles.