How Your Heart Works

The heart is a vital organ that basically serves as a pump. Learn about heart chambers and valves, blood flow, the heart's electrical system and blood supply. Read more about how this amazing organ works.

How the Heart Works - Heart Foundation

Heart healthdirect

How the Heart Works UCSF Department of Surgery

Chambers of the Heart

How a healthy heart works, Heart and Stroke Foundation

About the Heart and Blood Vessels - Stanford Medicine Children's Health

How Your Heart Works - _x264 on Vimeo

How Does Your Heart Work? (Rookie Read-About Health) by Don L. Curry

How Your Heart Works

How Your Heart Works, Helping Your Heart