( ( The ( pulmonary artery ) ) ( ( ( ( plays ( ( a ( crucial role ) ) ( in circulation ) ) ) , ) ( ( pumping ( oxygen-depleted blood ) ) ( from ( ( the heart ) ( to ( the lungs ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ pulmonary) (NN artery)) (VP (VBZ plays) (NP (NP (DT a) (JJ crucial) (NN role)) (PP (IN in) (NP (NN circulation)))) (, ,) (S (VP (VBG pumping) (NP (JJ oxygen-depleted) (NN blood)) (PP (IN from) (NP (NP (DT the) (NN heart)) (PP (TO to) (NP (DT the) (NNS lungs)))))))) (. .)))
The pulmonary artery plays a crucial role in circulation, pumping oxygen-depleted blood from the heart to the lungs.
(ROOT (S (SBAR (IN After) (S (NP (NP (DT the) (NN blood)) (PP (IN in) (NP (DT the) (JJ pulmonary) (NNS capillaries)))) (VP (VBZ becomes) (VP (VBN saturated) (PP (IN with) (NP (NN oxygen))))))) (, ,) (NP (PRP it)) (VP (VBZ leaves) (NP (NP (DT the) (NNS lungs) (CC and) (NNS travels)) (PP (TO to) (NP (DT the) (NN heart))))) (. .)))