Can you guess which is the hardest-working muscle in your body? Your heart! You probably don’t think about it often, but it still continues to pump with its faithful, steady beat, carrying blood to all your organs. Matters of the heart have left humans confused since the dawn of time, with sonnets and entire books devoted to the meaning of love. You cannot live without it. You cannot love without it. This Infographic provides you with fascinating facts about your own ticker.