The skin, the thin layer of tissue that covers our body, is not just a barrier between the external environment and the internal tissues. It is actually an organ in its own right. Composed of several distinct layers and specialized cells, the skin fulfills a multitude of functions. It protects the internal organs from attacks from the outside environment, infections, injuries and sun rays. Its nerve endings allow the sense of touch, such as pain and sensations of hot and cold.
Its specialized structures allow the secretion of various substances such as sweat or sebum, as well as the synthesis of vitamin D in the presence of ultraviolet rays of the sun. This multifunctional skin nevertheless remains a fragile organ, having no more than the thickness of a sheet of paper in places. It can break easily, ignite, dry out, become infected, and thus lose some of its integrity. The