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.

T he heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

As oxygen-rich blood flows to the left atrium from the pulmonary veins, it is called pulmonary arterial blood. Which side of the heart is rich in oxygen quizlet? ... Therefore, the tricuspid valve ...

It illustrates blood flow dynamics through the heart's chambers, including the right atrium, right ventricle, and pulmonary arteries, as well as the return of oxygenated blood from the lungs to ...

Oxygen-rich blood re-enters the heart through the left atrium, which is the upper left chamber. It then flows through the mitral valve to the left ventricle, or the left pumping chamber.

These features of the heart aid in proper blood flow throughout the body and supply the heart with oxygen-rich blood needed to function. ... How Blood Flows through the Heart. MedlinePlus.

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 blood, now laden with oxygen, moves to the heart’s left side from the lungs, and then is pumped back into the body to start its flow once again. Congenital heart defects alter the blood flow ...