Gabriel Ochocki (1601–1673) — physician, doctor of medicine. Author of the treatise Quæstio de motu cordis, in which, parallel to William Harvey in 1628, he described the mechanism of the circulatory system in the human body. These works were revolutionary to previous views on the subject of blood circulation. As he wrote: „Ut sanguinis venosi in cor attractio, ita arteriosa corde transmissio naturalis existit” (both the attraction of venous blood to the heart and the rushing of arterial blood away from the heart occurs naturally).