One of the most vital organ of our body is heart. We can’t live without our heart.But how our heart works and how it keeps us alive not known to many of us.However, when you get right down to it, the heart is just a pump.A complex and most important one. It is basically a complex pump, responsible for circulating blood, oxygen and nutrients around the body. So to know this complex mechanism watch this video on "How our Heart Works?"
