T he heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is ...

Learn How the Heart Works. Your heart is an amazing organ. It continuously pumps oxygen and nutrient-rich blood throughout your body to sustain life. This fist-sized powerhouse beats (expands and ...

Takeaways. Your heart is the pump that makes it possible for blood and oxygen to flow through your body and keep you alive. The heart has four chambers and four valves.

When blood returns to the heart, ... Blood flows through the left atrium into the left ventricle. The left ventricle pumps the oxygen-rich blood to all parts of the body.

New computer models that track the motions of blood flow in the heart may reduce the risk of stroke, according to researchers at Johns Hopkins Medicine. Using specialized CT scans, a team of ...

Studying blood flow dynamics to identify the heart of vessel failure. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2016 / 08 / 160816120623.htm ...

Heart valves allow blood to flow into the heart, through the chambers, and out to the rest of the body. They also prevent blood from flowing back the wrong way.

The heart valves work by ensuring that blood flows in a forward direction and doesn’t back up or cause leakage. Heart valve disorders prohibit this.

A heart murmur indicates turbulent blood flow through the heart's valves, Dr. Kenneth Ellenbogen, a professor of cardiology and the director of clinical cardiac electrophysiology and pacing at the ...

Keywords heart anatomy, fluorography, venous catheterization, blood flow, cardiac cycle, right atrium, left atrium, coronary arteries, selective opacification, physiological data Email us at ...

Map of the Human Heart 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.