Heart anatomy, 19th Century illustration. Historical hand coloured lithographic print showing the anatomy of the human heart, the coronary arteries (thin red) that supply it and the lymph vessels (white lines) associated with it. The heart is composed of four chambers. Two upper chambers, the atria (centre), and two lower chambers, the ventricles (lower right). Image from Traite complet de lanatomie de lhomme, comprenant la medecine operatoire Vol. 4 (1836), by JeanBaptiste Marc Bourgery and illustrated by NicolasHenri Jacob.
