Integumentary system

<p><a href="http://en.wikipedia.org/wiki/Integumentary_system" title="Integumentary system">Integumentary system</a>: <a href="http://en.wikipedia.org/wiki/Skin" title="Skin">skin</a>, <a href="http://en.wikipedia.org/wiki/Hair" title="Hair">hair</a> and <a href="http://en.wikipedia.org/wiki/Nail_%28anatomy%29" title="Nail (anatomy)">nails</a>.</p>