The pulmonary circulation moves blood between the heart and lungs. It carries deoxygenated blood to the lungs where it takes in oxygen and releases carbon dioxide. Oxygenated blood returns to the heart. Systemic circulation moves blood between the heart and other parts of the body. It sends oxygenated blood to the cells and deoxygenated blood back to the heart.
The heart, together with the arteries and veins that carry blood throughout the body, make up the circulatory system. Life requires the constant circulation of blood. It transports oxygen from the air we breathe to all of the body's cells. This blood flows through the arteries, capillaries, and veins as a result of the heart's pumping action. Blood is pumped by one set of blood arteries via the lungs so that gases can be exchanged. The remainder of the body is fueled by the other vessels.
The heart pumps oxygen-rich blood from the left ventricle into the aorta to initiate systemic circulation. After supplying oxygen and nutrients to cells throughout the body, the blood returns deoxygenated blood to the right atrium of the heart. Deoxygenated blood flows from the right atrium into the right ventricle. The heart pumps it out of the right ventricle into the pulmonary artery, starting the pulmonary circulation. Blood travels to the lungs, exchanges carbon dioxide for oxygen, and returns to the left atrium. Oxygenated blood flows from the left atrium into the underlying left ventricle to resume systemic circulation.
Above Answer distinguish properly between pulmonary and systemic circulation.
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