Ductus venosus connects
Ductus venosus shunts a poion of the left umbilical vein blood flows directly to the inferior vena cava. Thus, it allows oxygenated blood from the placenta to bypass the liver. BD CHAURASIA'S HUMAN ANATOMY.VOLUME 1. 6T H EDITION.PAGE NO 268
Pulmonary trunk and IVC
Right atrium and left atrum
Left umbilical vein and IVC
Pulmonary trunk and ascending aoa
Thorax