I missed this shirt because i sleep before 12, ha-ha. But it's time for anal retentive med student rambling!
i do have to say though, the heart is slightly left not directly in the middle, and that bugged me a little bit.
Bingo. The heart should be further right on the shirt (anatomical left), the gallbladder should nest right underneath the liver, both kidneys are too high (and should really be in the back), stomach is too low, pancreas too low, hey, where's my large intestine? And you know what would be awesome, would be stickers on the back labeled "rectum" and "anus". ...For a real touch of med student humor you could color the appendix red, or maybe add in a post-it somewhere by the "intestines" note, labeled "string of pearls".
On second thought, this shirt could be potentially hilarious...I can think of quite a few obsessive-compulsives that would immediately tell me my shirt was off (as per the above paragraph). Yeah, that would be fun. =)
Either way, awesome shirt. I would be in for one but I'm not sure if I want to pay $15 for it.