Pulmonary veins develop from:

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.