Heartbeat 101: What is going on when your heart is beating?
Heartbeat: Ever felt your heart skip a beat? Find out what you can do when your heartbeat feels anything but normal. Our bodies are made up of many different parts that work together to help us live our lives. This includes our hearts, which pump blood through the body while they beat. What is the cause of this pumping? The heart's job is to move oxygenated blood throughout the body and to remove carbon dioxide. So what happens if something goes wrong with your heart?( more )