The right limb of the atrioventricular bundle at three levels of magnification.
Gardner and O'Rahilly, 1976, Figs. 24-26
Click on the picture to view the full-sized image.
Keywords: atrioventricular bundle, left atrium, right atrium, right limb of the atrioventricular bundle, superior vena cava
Source: The Virtual Human Embryo.