a link on BoingBoing I just discovered John Hutchinson's blog, rather accurately titled 'What's in John's Freezer' since it is 'about celebrating the joy and wonder of organismal morphology, which researchers’ freezers help preserve.'
There's also a fair bit of morphology and physiology and lots of revealing (pun intended) photographs such as this X-ray of an elephant's foot - revealing a surprisingly human bone structure.
But for the real fun it gets a little gory. What is inside an elephant? Guts, lots of guts. No seriously, more guts than you are imagining.