Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and relax to pump blood throughout your body. When blood returns ...

The heart is a large muscular organ which pumps blood to the lungs and then the rest of your body. It has four chambers. Humans have a double circulatory system, which means the blood passes ...

Q. I have a leaky heart valve that may need surgery down the road. Can you tell me about heart-valve surgery in one of your columns? A. First, let’s explain briefly how the heart works.

Locate the vessels entering and leaving the heart and the 2 heart chambers - atrium and ventricle. Look at diagram of blood flow through the heart - Figure 10.9 on page 97 of lab manual. Next, follow ...

The ancient Greek philosopher and polymath Aristotle once concluded that the human heart is tri-chambered and that it was the ...

It may not be detected until physical exertion (in the girl’s case a two-minute dance) triggers abnormal heart rhythms. Overexertion during exercise can raise blood pressure and heart rate, ...

Inside the cavernous chambers, the muscles work together in perfect harmony. These muscles never get tired and never stop working until you die. As your heart expands, blood flows from your body ...

A new study suggests that certain substances in the blood may help identify people with a type of irregular heartbeat called ...

Originally appeared on the NOVA Web site Cut to the Heart. Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and ...