The chambers in the upper part of the heart , which receive blood from the rest of the body , is called Atria.
- The atria are the two upper chambers. Blood is given out and collected. The ventricles are the two bottom chambers.
- Blood circulates through the four chambers of the heart. Right atrial blood flows into and via the right ventricle.
- The blood is pumped from the right ventricle to the lungs, where it is oxygenated.
- The pulmonary veins that enter the left atrium return the oxygenated blood to the heart.
- Blood enters the left ventricle from the left atrium. The aorta will deliver the oxygenated blood to every part of the body when the left ventricle pumps blood there.
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