The right pulmonary artery gives off branches for each of the segments of the middle and lower lobes.

The veins of the middle lobe which are located anterior to the bronchus join branches from the upper lobe to form the upper pulmonary vein, which is in direct contact with the medial aspect of the bronchus intermedius.

The inferior pulmonary vein can be found posterior to the bronchial structures, and in contact with the posteromedial aspect of the origin of the basal bronchi.

Right pulmonary artery

Veins of the middle lobe

Inferior pulmonary vein