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( Pulmonary circulation)
Pulmonary circulation is the portion of the cardiovascular system which carries oxygen-depleted blood away from the heart, to the lungs, and returns oxygenated blood back to the heart. The term is contrasted with systemic circulation. In the pulmonary circulation, deoxygenated blood exits the heart through the pulmonary arteries, enters the lungs and oxygenated blood comes back through pulmonary veins. The blood moves from right ventricle of the heart to the lungs back to the left atrium. Oxygen-depleted blood from the body leaves the systemic circulation when it enters the right heart, more specifically the right atrium through the superior vena cava. The blood is then pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle. From the right ventricle, blood is pumped through the pulmonary semilunar valve into the pulmonary artery. This blood enters the two pulmonary arteries (one for each lung) and travels through the lungs.
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Pulmonary circulation Subcategories
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