( Potassium ( ( is ( ( ( a ( key nutrient ) ) ( for ( ( the ( healthy functioning ) ) ( of ( many ( of ( ( the ( body 's ) ) systems ) ) ) ) ) ) ) ( including ( the ( cardiovascular ( and ( parasympathetic ( nervous systems ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Potassium)) (VP (VBZ is) (NP (NP (DT a) (JJ key) (NN nutrient)) (PP (IN for) (NP (NP (DT the) (JJ healthy) (NN functioning)) (PP (IN of) (NP (NP (JJ many)) (PP (IN of) (NP (NP (DT the) (NN body) (POS 's)) (NNS systems))))))) (PP (VBG including) (NP (DT the) (JJ cardiovascular) (CC and) (JJ parasympathetic) (JJ nervous) (NNS systems))))) (. .)))
Potassium is a key nutrient for the healthy functioning of many of the body's systems including the cardiovascular and parasympathetic nervous systems.
(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.