Kidneys. 19th century artwork showing a dissected abdomen from the rear. The aorta (red), the body's main artery, and the vena cava (blue), the body's main vein, are running down centre. Either side if them at centre are the two kidneys. This anatomical artwork is plate 6 from volume 5 (1839) of 'Traite complet de l'anatomie de l'homme' (1831-1854). This 8-volume anatomy atlas was produced by the French physician and anatomist Jean-Baptiste Marc Bourgery (1797-1849). The illustrations were by Nicolas-Henri Jacob (1781-1871).