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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.
Pulmonary circulation is the movement of blood though the right side of the heart, to the lungs, and then back through the left side of the heart. The âlub dubâ you hear when using a stethoscope is the sound of the ventricles contracting and the heart valves closing during this circulation process.