What of transfusing blood? Experiments with this began near the start of the 16th century. Thomas Bartholin (1616-80), professor of anatomy at the University

University of Copenhagen, objected: 'Those who drag in the use of human blood for internal remedies of diseases appear to misuse it and to sin gravely. Cannibals are condemned. Why do we not abhor those who stain their gullet with human blood? Similar is the receiving of alien blood from a cut vein, either through the mouth or by instruments of transfusion. The authors of this operation are held in terror by the divine law, by which the eating of blood is prohibited.'
Hence, thinking people in past centuries realized that the Biblical law applied to taking blood into the veins just as it did to taking it into the mouth. Bartholin concluded: "Either manner of taking [blood] accords with one and the same purpose, that by this blood a sick body be nourished or restored