Читать книгу The Face Lift Massage: Rejuvenate Your Skin and Reduce Fine Lines and Wrinkles - Narendra Mehta - Страница 11

The skin plays a key role in regulating your temperature. If you get too hot, perhaps because you’ve just entered a warm environment or have been exercising hard, the blood vessels in the skin dilate to allow more blood to pass through them. This allows excess heat to escape from the surface of the body through convection and radiation. It is the increased flow of blood through the skin that makes you look flushed. As an extra measure against overheating, the sweat glands produce perspiration that seeps on to the surface of the skin through tiny pores. The perspiration absorbs heat as it evaporates and so helps to lower your temperature.

In cold weather, blood vessels in your skin contract to reduce the amount of blood flowing near the surface of your body and so conserve your heat. This is why some people look pale or almost blue when they’re cold. In addition, the hairs on the skin stand up and this traps a layer of warm air around the body to provide extra insulation. When this happens, small bumps called goose pimples appear on the skin as tiny muscles pull the hairs upright.