Sentence:  Our own studies in which bronchial artery pulmonary artery anastomoses were demonstrated , were accomplished by injecting the bronchial artery first with no pressure on the <WSD>pulmonary</WSD> artery or vein , and then by injecting the pulmonary artery and vein afterwards . 
Meaning of the word marked with <WSD> tags:  one of two arteries (branches of the pulmonary trunk) that carry venous blood from the heart to the lungs