How Your Heart Works How Your Heart Works Everyone knows that the heart is a vital organ. We cannot live without our heart. However, when you get right down to it, the heart is just a pump. A complex and important one, yes, but still just a pump. As with all other pumps it can become clogged, break down and need repair. This is why it is critical that we know how the heart works, With a little knowledge about your h.. 2012. 10. 16. 이전 1 ··· 16 17 18 19 20 21 다음