list any two contribution of william harvey in blood circulation
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Harvey also proved that blood flows in two separate loops, the pulmonary circulation and the systemic circulation. He then tied a ligature on the upper arm of a person, which distended the veins in the forearm and made the valves of the forearm clearly visible.
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1.he dissected dead peoples heart and studied valves present bw the auricles and ventricles which was ignored by fabricus
2.he said humans have a double circulation
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