The pulmonary circulation starts in the heart., The heart pumps blood with carbon dioxide through the pulmonary artery to the lungs., In the alveoli, the blood delivers carbon dioxide., In the alveoli, the blood takes oxygen., The blood with oxygen returns to the heart through the veins., After the pulmonary circulation, the heart pumps blood with oxygen through the arteries., In the arteries, the blood carries oxygen and nutrients to all parts of the body., In the capillaries, the blood delivers oxygen and nutrients., In the capillaries, the blood collects carbon dioxide and waste., In the veins, the blood returns to the heart..

The Circulation Process

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