( ( ( ( ( Gas transport ) , ) ( ( carried out ) ( by ( the ( cardiovascular system ) ) ) ) ) , ) ( ( is ( ( the process ) ( of ( ( ( ( distributing ( the oxygen ) ) ( throughout ( the body ) ) ) and ) ( ( ( collecting CO2 ) and ) ( ( returning it ) ( to ( the lungs ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Gas) (NN transport)) (, ,) (VP (VBN carried) (PRT (RP out)) (PP (IN by) (NP (DT the) (JJ cardiovascular) (NN system)))) (, ,)) (VP (VBZ is) (NP (NP (DT the) (NN process)) (PP (IN of) (S (VP (VP (VBG distributing) (NP (DT the) (NN oxygen)) (PP (IN throughout) (NP (DT the) (NN body)))) (CC and) (VP (VP (VBG collecting) (NP (NNP CO2))) (CC and) (VP (VBG returning) (NP (PRP it)) (PP (TO to) (NP (DT the) (NNS lungs)))))))))) (. .)))
Gas transport, carried out by the cardiovascular system, is the process of distributing the oxygen throughout the body and collecting CO2 and returning it to the lungs.
(ROOT (S (NP (NP (CD One) (NN function)) (PP (IN of) (NP (DT the) (JJ cardiovascular) (NN system)))) (VP (VBZ is) (S (VP (TO to) (VP (VB transport) (NP (NNS gases)) (PP (IN throughout) (NP (DT the) (NN body))))))) (. .)))
One function of the cardiovascular system is to transport gases throughout the body.