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Deoxygenated blood comes to the heart from the upper body through the superior vena cava and from the lower body through the inferior vena cava.
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The blood flows to the right atrium.
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The blood flows from the right atrium to the tricuspid valve.
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The blood flows out from the tricuspid valve to the right ventricle.
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The blood from the right ventricle then flows to the pulmonary valve.
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Blood from the pulmonary valve flows into the pulmonary artery.
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The blood from the pulmonary artery flows to the right and left to go to the lungs to get oxygen.
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Blood coming from the lungs then flows to pulmonary veins to get back to the left side of the heart.
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The blood then flows from the pulmonary vein to the left atrium.
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Before the blood can get to the left ventricle it has to flow through the bicuspid valve.
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Blood flows from the bicuspid valve into the left ventricle.
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From the left ventricle blood flows to the aortic valve.
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The blood then flows to the aorta from the aortic valve.
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After the blood leaves the aorta, fully oxygenated, it flows to all parts of the body so they can get the blood they need to function.
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