three hearts

Thanks to the little bits of trivia printed on La Vache Qui Ris cheeses, I learned that cephalopods (squids, octopuses, cuttlefish, nautiluses) have three hearts. Two hearts feed the gills and the third, larger heart pumps blood throughout the body. I've already been fascinated with their abilities to change shape, size, color, and texture. So finding out they have three hearts was quite an awe-inpsiring surprise. Given everything that our one human can do, imagine the possibilities with three hearts. Then again, though, cephalopods may have three hearts but they have no skeletal systems -- all heart, no backbones.