The largest organ in the human body is the skin. The skin acts as an outer covering thereby protecting all the internal organs of the body. The three primary layers of the skin are the epidermis, dermis and hypodermis. Apart from protection, the other functions of skin are it helps excreat sweat from the body, prevent washing away of nutrients from the body, provides sensation and prevents loss of fluid. This quiz will help you understand more about the human skin.