List the main functions of the skin. What is the role of skin in metabolism?

Being strong and elastic, the skin protects tissues and organs from the mechanical effects of the external environment. It is practically impervious to microorganisms. The presence of sensitive nerve endings allows her to perform a receptor function. Thanks to the pigment melanin present in it, the skin is able to protect the organs and tissues lying under it from the action of ultraviolet rays. Water, mineral salts and other metabolic products are then removed from the body through the skin. The skin plays an important role in maintaining a constant body temperature. Through it, up to 90% of the heat generated in the body is excreted.

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