The vascular and arterial system of the human brain (II), the pulmonary artery (III), the venal artery (IIII) and the portal system of veins (I). Engraving, 1568.

Licence: Public Domain Mark

Credit: The vascular and arterial system of the human brain (II), the pulmonary artery (III), the venal artery (IIII) and the portal system of veins (I). Engraving, 1568. Wellcome Collection. Source: Wellcome Collection.