GENERAL KNOWLEDGE

Detailed explanation-1: -He tried to force blood in a vein down the forearm, but to no avail. When he tried to push it up the arm, it moved easily. Harvey had proved that the venous blood flowed to the heart, and that the body’s valves in the veins maintained the one-way flow.

Detailed explanation-2: -His idea, that blood is pumped around the body by the heart in a state of ceaseless motion, proved highly controversial to some, challenging 1, 500 years of established scientific and medical belief. Harvey encouraged his fellow physicians ‘to search and study out the secrets of nature by way of experiment’.

Detailed explanation-3: -Harvey’s theory of circulation was opposed by conservative physicians, but it was well established by the time of his death. It is likely that Harvey actually made his discovery of the circulation about 1618–19.

Detailed explanation-4: -The circulation of the blood was discovered in 1628 by William Harvey. Blood pressure was first measured in animals by Hales (1733). Reliable blood pressure measurements in humans were rendered possible at the beginning of the 20th century through the efforts of Mahomed, von Basch, Potain, Riva-Rocci and Korotkoff.