Organs and special tissue
Polar Bears' bones are very thick, to support their massive weight. Polar Bears have a snout, long legs, coral ribs, tiller base, padded paws, stomach, eyes, mouth, and jaws.
Cavendish, Marshall. "Mammal Anatomy:." Google Books. Marshall Cavendish Corporation, 2010. Web. 20 Apr. 2013. <http://books.google.com/books?id=mTPI_d9fyLAC>.