Hindu Achievements in Exact Science: A Study in the History of Scientific Development c20.s4.4

c20.s4.4

But the Hindus did not understand the process clearly. (1) They did not know that the pathway of the blood round and round the body is a "double circle," i.e., "systemic" circulation and "pulmonary" circulation. (2) Neither Charaka nor Sushruta, therefore, understood the function of the lungs in the oxygenation of blood. This was not known to the ancients in Europe also, e.g., to Galen (A.D. 130).