The Pathway of Blood Flow Through the Heart, Animation.

Animation of blood flow through the heart. How the heart works. The cycle of blood flow and the role of heart valves described.
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The heart has two sides: right and left; each side has two chambers : an atrium and a ventricle. The right side of the heart is in charge of the pulmonary circuit, it receives oxygen-poor blood from the body and pumps it into the lungs for gas exchange. The left side of the heart is in charge of the systemic circuit, it receives oxygen-rich blood from the lungs and pumps it through the aorta to the rest of the body.
The heart has four valves : two atrioventricular valves (AV valves) and two semilunar valves. Their function is to ensure that the blood flows only in one direction throughout the heart, i.e. they prevent blood backflow.
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