Frikin' awesome & original entry! Fav'ed it.

Your SBS only shows making the heart, not the rib cage and etc, or at least explain in a few words the toughest part- which reminds me of "how to draw an owl tutorial in 2 steps":
http://imc1.piccsy.com/13357-ba33a2-500-407.jpg

But maybe you forgot to take pics, or your batteries died.
People might notice the torso has only 16 ribs, i think it looks better this way and i'm sure it was your compositional choice.
That writing and the sketchy-look, make this a top imo, so congrats for a good work.

Fabulously unique entry....u did really really great job here author...very well done...

Thank u alot for comments, guys! Actually I forgot to take a pic when i was making a rib cage :/ I found a xray pic of human body (yeah, i know there is few ribs missing, but 16 was too many for me, so I left only half of it lol), and when I started drawing it, I just couldn't stop lol And sometimes interrupting when u r doing something (specially when u r drawing) just drives me mad lol. Anyway, if u want I can make the missing SBS And I'm really glad u liked it ))))

scribbling on a good heart is a job of a bad heart
your heart has come out very well author

What an awesome interpretation of the theme! On a scientific level even! GL author!

Are you a Doctor or a scientist ? This is killer

great job .

Creative take on the contest. Nice work!

Competition is tough around here, and this is my favorite one. Lots of detail.