( ( ( the volume ) ( pumped ( in ( a minute ) ) ) ) ( ( ( ( is ( called ( the ( cardiac output ) ) ) ) and ) ( is ( ( the product ) ( of ( ( ( the ( stroke volume ) ) and ) ( the ( heart rate ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT the) (NN volume)) (VP (VBN pumped) (PP (IN in) (NP (DT a) (NN minute))))) (VP (VP (VBZ is) (VP (VBN called) (NP (DT the) (JJ cardiac) (NN output)))) (CC and) (VP (VBZ is) (NP (NP (DT the) (NN product)) (PP (IN of) (NP (NP (DT the) (NN stroke) (NN volume)) (CC and) (NP (DT the) (NN heart) (NN rate))))))) (. .)))
the volume pumped in a minute is called the cardiac output and is the product of the stroke volume and the heart rate.
(ROOT (S (NP (NP (DT The) (NN term) (JJ cardiac) (NN output)) (, ,) (VP (VBN calculated) (PP (IN by) (S (VP (VBG multiplying) (NP (NN heart) (NNS contractions)) (PP (IN by) (NP (NN stroke) (NN volume))))))) (, ,)) (VP (VBZ means) (NP (NP (DT the) (NN volume)) (PP (IN of) (NP (NP (NN blood)) (VP (VBN pumped) (PP (IN by) (NP (NP (DT the) (NN heart)) (PP (IN in) (NP (CD one) (NN minute)))))))))) (. .)))
The term cardiac output, calculated by multiplying heart contractions by stroke volume, means the volume of blood pumped by the heart in one minute.