"right superior: drains the right upper and middle lobes"
"right inferior: drains the right lower lobe"
"left superior: drains the left upper lobe"
"left inferior: drains the left lower lobe"
"There are typically four pulmonary veins, two draining each lung:"
"There is extensive communication with deep bronchial veins within the lung and with the superficial bronchial veins at the hilum."