Think it's a hassle when your car breaks down? Try finding a spare organ when your body gives out. Thanks to years of research, scientists are now amassing a "body shop"Ã‚Â of sorts, dealing not in tires or mufflers, but in bladders, bones and breasts.
But no matter how many times you've doodled one on a piece of paper or touched your chest when expressing affection for someone, there's probably a lot you don't know about it. So what are five things you don't know about your heart?
By waxing, shaving, plucking and shearing, we manage to keep unwanted hairs at bay. But considering how much you shell out for new razors and your trips to the salon, it's a wonder that we bend over backward to groom a bunch of dead cells.