Sentence:  The <WSD>pulmonary</WSD> artery , in addition to supplying the distal portion of the respiratory bronchiole , the alveolar duct , and the alveoli , continues on and directly supplies the thin pleura ( fig. 8 ) . 
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