Sure, you know how to steal hearts, win hearts, and break hearts. But how much do you really know about your heart and how it works? Read on to your heart's content! Put your hand on your heart.

Last. Know what a healthy beat sounds like? Lub-dub. That the valves inside the heart closing. But your amazing ticker is always open for business, pumping blood 24/7. So take great care of it.

This is because the axolotl is one of nature's scrappiest ... little blockage in our heart vessel will lead to extreme damage and eventually death, these guys are pretty amazing." ...

The citrulline in watermelon helps reduce muscle soreness and fatigue. It helps heart patients from exercising or physical activity. It can aid in quicker recovery and reduce discomfort.

Are you always on the lookout for new trails to explore? Head to the heart of the Dolomites, in Italy, and get fully immersed in nature during this 10-day hike.

Originally appeared on the NOVA Web site Cut to the Heart. Sure, you know how to steal hearts, win hearts, and break hearts. But how much do you really know about your heart and how it works?