How the Heart Works

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The heart is a pump for all of the blood in the body, with arteries carrying blood away from the heart and veins carrying blood back. Find out about the atria and ventricles of the heart with information from a cardiologist in this free video on cardiology and the heart.

Part of the Video Series: Cardiology Information
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Video Transcript

Hi, my name is Eric Frischhertz. I'm a cardiologist in Austin, Texas with I'm here to answer the question, how does the heart work. The heart is a pump for all the blood in the body. Arteries are the part of the heart that carries blood away from, is part of the body that carry blood away from the heart and veins are the part of the blood vessel system that carry back to the heart. Here in our model, I'll open up the heart. There are four chambers, two on the top and two on the bottom. Top chambers are called the atria, they act as a reservoir for blood. The bottom chambers are called the ventricles, and they are the actual pumps for the heart. The right sided chamber, on the patient's right, pumps blood to the lungs and the left sided chamber pumps blood through the aorta to every other part of the body besides the lungs. The blood then comes back from the entire body in to the right side of the heart is pumped through the lungs to get oxygenated, back to the left side of the heart and the oxygenated blood is then pumped to the rest of the body.


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