The skin is the largest organ in the body that there are three types of the integumentary (skin) system, the epidermis, the dermis and the hypodermis. All three basically have different jobs that work to protect, prevents water loss, regulates metabolism and temperature, absorption and also acts as a sensory receptor. For instance the epidermis protects the body from injury and trauma. The skin also protects from chemicals and toxins even from solar radiation. When its come to water loss or water gain the epidermis is water resistant. The way the body regulates body temperature is through the blood vessels, which are in the dermis of the skin. In vasoconstriction decrease so that less blood can travel through the vessel and vasodilation
