( ( The ( pulmonary circulation ) ) ( ( ( ( involves ( circulation ( of ( ( deoxygenated blood ) ( from ( ( the heart ) ( to ( the lungs ) ) ) ) ) ) ) ) , ) ( so ( that ( it ( may ( be ( properly oxygenated ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ pulmonary) (NN circulation)) (VP (VBZ involves) (NP (NP (NN circulation)) (PP (IN of) (NP (NP (JJ deoxygenated) (NN blood)) (PP (IN from) (NP (NP (DT the) (NN heart)) (PP (TO to) (NP (DT the) (NNS lungs)))))))) (, ,) (SBAR (RB so) (IN that) (S (NP (PRP it)) (VP (MD may) (VP (VB be) (VP (ADVP (RB properly)) (VBN oxygenated))))))) (. .)))
The pulmonary circulation involves circulation of deoxygenated blood from the heart to the lungs, so that it may be properly oxygenated.
(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))))) (. .)))