The role of the skin
Our skin is the body’s biggest organ, and it performs many functions. A major role is for protection against physical aggressors such as friction, chemicals and infection, as well as against harmful UV rays. Besides protecting against external forces, it’s also our largest sensory organ, and we receive much information about the world through the nerve endings in our skin. These experiences range from heat, cold and pain to the comforting touch of friends and loved ones.
Another major role of the skin is temperature regulation. Our skin contains about 2-5 million sweat glands, and we can sweat up to 10 or more liters per day in hot climates to help our bodies cool down. When it’s cold, sweat production and blood supply to the skin is reduced to help conserve heat in deeper organs.3