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The hypothalamus is the processing centre in the brain that controls body temperature. It does this by triggering changes to effectors, such as sweat glands and muscles controlling body hair. Heat stroke can happen when the body becomes too hot; and hypothermia when the body becomes too cold.
Skin Function: Sensing. Protective Barrier. The dermis does more than just regulate your body temperature. Because the dermis contains oil glands, it also controls the secretion of oils on your hair and skin that serve as a protective barrier against foreign substances.hen the body is hot, the red blood cells expand, allowing heat to be released through the surface of the skin [source: The Merck Manuals ]. The subcutaneous layer is made up of fat cells and fibrous tissue [source: The Merck Manuals ]. Like the dermis, the subcutaneous layer helps to regulate body temperature.