Pulmonary veins develop from:
Sixth aoic arch
Primitive left atrium
Left common cardinal vein
Left vitelline vein
According to some authorities, pulmonary veins develop from the left atrial wall. There is no consensus about whether the pulmonary vein arise as a branch from the left atrium and obtains a connection to the lung plexus OR the pulmonary vein forms as a solitary vessel in the dorsal mesocardium =give rise to 4 pulmonary veins = secondarily get absorbed into wall of left atrium Fig. : Absorption of pulmonary veins into the left atrium. RPV = right pulmonary vein; LPV = left pulmonary vein.
Bronchopulmonary Segments, Embryonic veins