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Identifier: someapostlesofph00stir (find matches)
Title: Some apostles of physiology : being an account of their lives and labours, labours that have contributed to the advancement of the healing art as well as to the prevention of disease
Year: 1902 (1900s)
Authors: Stirling, William, 1851-1932
Subjects: Physiology Physiologists Physiology
Publisher: London : Priv. print. by Waterlow and sons limited
Contributing Library: West Virginia University Libraries
Digitizing Sponsor: LYRASIS Members and Sloan Foundation

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themore subtle portion of the blood which the right ventricle of the heart communicates tothe left. This communication, however, does not take place through the septum,partition, or midwall of the heart, as commonly believed, but by another admirablecontrivance, the blood being transmitted through the pulmonary artery to the pulmonaryvein, et a vena arteriosa in arteriam venosam transfunditur, by a lengthened passagethrough the lungs, in the course of which it is elaborated and becomes of a crimsoncolour. Mingled with the inspired air in this passage, and freed from fuliginousvapours by the act of expiration, the mixture being now complete in every respect,and the blood become a fit dwelling place for the vital spirit, it is finally attracted bythe diastole, and reaches the left ventricle of the heart. He remarks on the great size of the pulmonary artery, itsvarious conjunctions in the lungs with the pulmonary vein withinthe substance of the lung, as showing that so large a stream of
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£2$s&/«£ JaJpsii Qr^iam&ttryi MICHAEL SERVETUS ( 7 ) blood would not pass to the lungs for their nourishment only. Thelungs of the foetus are otherwise nourished. The mixture of bloodand air takes place in the lungs, not in the heart, and it is inthe lungs that the florid colour of the spirituous blood is acquired.R. Willis, the biographer of Servetus and Vesalius, justlyremarks that— Vesalius, the observer, abiding by the concrete, describes with rare fidelity andtruthfulness what he witnessed : Servetus, gifted with genius, aspiring to the ideal, andinferring consequences, deduced the pulmonary circulation from the structure of theheart and lungs. (Servetus and Calvin, by R. Willis, M.D., 1877, p. 106.) There is, however, no idea of a circulation in the sense in whichwe now understand it. To Servetus the liver and the veins connectedwith it were the great organ for the growth and nourishment of thebody. The heart was the source of the heat of the body, and, with the con

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