For Tyler...

What is the Skin's Role?

The skin is another part of the system, containing sweat that help regulate the concentration in one's body while also keeping him or her cool. The salt helps evaporate the water, cooling off the skin. Sweat is excreted through sweat glands. There are two types of sweat glands: Eccrine sweat glands and Apocrine sweat glands. The basic purpose of skin is to provide a waterproof, protective, covering for the body's complex internal environment. The skin also plays a key rules in helping to maintain the circulatory and nervous system. 

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I hope this helps you consolidate your thoughts with mine.