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Talking about skin; the human skin covers the whole of the body.  It is the largest human organ of the body.  It is also the fastest growing organ.  It is the only human organ that is visible on the human body.  The other human organs are all protected inside the body.

The human skin, however, protects the whole body against harmful factors in the environment on its outside.  Skin is the body’s coat.  It helps to keep the body warm in cold and icy weather.  It also keeps the body cool when it is hot.  The skin plays an important role in the regulation of the body’s temperature.

The skin keeps everything that needs to be on the inside, in, for instance, the heart, lungs blood and muscles.  It also keeps stuff out, things that can be harmful, like germs and liquids or water.  Unless the skin is broken or cut, it won’t let in things from the outside.  The body can store things in the skin, like water and fat, which is needed for the body’s metabolism.

The skin produces vitamin D with the help of sunlight.  Vitamin D is essential in keeping the body healthy and strong.

Skin allows the body to notice sensations, such as cold, heat, pain, pressure, and much more.

Because of the skins interactions with the outside environment, it also plays a very important role in the immunity of the body.