Organs and Special Tissue
Polar Bears have a central and peripheral nervous system, just like humans.
Swanson, James R. "Re: Important Organs and Structures inside a Polar Bear?" Re: Important Organs and Structures inside a Polar Bear? MadSci.org, n.d. Web. 20 Apr. 2013.
http://www.madsci.org/posts/archives/2000-06/961550606.Zo.r.html
http://www.madsci.org/posts/archives/2000-06/961550606.Zo.r.html