File:Tri-State medical journal and practitioner (1897) (14591729330).jpg

Identifier: tristatemedicalj4189unse (find matches)
Title: Tri-State medical journal and practitioner
Year: 1897 (1890s)
Authors:
Subjects: Medicine
Publisher: St. Louis : (s.n.)
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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ected an unusually large number of bodies.Fourteen subjects passed under his scalpel in a single year. Columbusfrequently made experiments upon living animals. He was the first to usedogs for such purposes, preferringthem to swine. Book XIIII. of the workof Columbus is upon the subject of vivisection: De viva sectione. In thishe tells us how to employ living dogs in demonstrating the movements of theheart and brain, the action of the lungs, etc. Columbus was the first whodemonstrated experimentally that the blood passed from the lungs into thepulmonarv veins. When the heart dilates, says Columbus, it draws 448 Historical Sketch. natural blood from the vena cava into the right ventricle, and preparedblood from the pulmonary vein into the left; the valves being so disposedthat they collapse and permit its ingress; but when the heart contracts,they become tense, and close the apertures, so that nothing can return bythe way it came. The valves of the aorta and pulmonary artery opening, on
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Ve nstiis, ExTypographiaNicoIaiBeuilacqua:, u d lix.Cvm privilb en s. Title-page of the Book of Columbus, 1559. the contrary, at the same moment, give passage to the spirituous blood fordistribution to the body at large, and to the natural blood for transferenceto the lungs (translation of Willis: Win. Harvey, pp. 90-91). LikeServetus, Columbus held to the idea of spiritus. Harvey was the first Historical Sketch. 449 physiologist who recognized the circulation as purely a movement ofblood. All before him assumed the existence of a mixture of air and blood.Columbus, pupil and prosector of Vesalius, like his great master, deniedthe existence of foramina in the cardiac septum. He says (Ltd. viz., DeCordeet Arteriis,p. 177): Between the ventricles is the septum throughwhich almost every one believes the blood passes from the right ventricleto the left, in order that it may be refined, during its transit, for thegeneration of vital spirits. But in this they are very far from the truth;for

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