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. 2008 Oct 9;105(6):1877–1880. doi: 10.1152/japplphysiol.91171.2008

Fig. 3.

Fig. 3.

Section of the Arab text from the Commentary on Anatomy in Avicenna's Canon by Ibn al-Nafis dealing with the pulmonary circulation. This extract states that there is no connection between the two cavities of the heart (right and left ventricles) and that blood cannot pass through the (interventricular) septum. From Ref. 15.