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Circulation. (Science: physiology) movement in a regular or circuitous course, as the movement of the blood through the heart and blood vessels. Origin: L. Circulatio. Please contribute to this project, if you have more information about this term feel free to edit this page.
Definition of pulmonary circulation. : the passage of blood from the right side of the heart through arteries to the lungs where it picks up oxygen and is returned to the left side of the heart by veins.