( ( ( the ( complex system ) ) ( of ( the ( human body ) ) ) ) . )
(ROOT (NP (NP (DT the) (JJ complex) (NN system)) (PP (IN of) (NP (DT the) (JJ human) (NN body))) (. .)))
the complex system of the human body.
(ROOT (S (NP (DT The) (JJ cardiovascular) (NN system)) (VP (VBZ moves) (NP (NP (NNS nutrients)) (CC and) (NP (JJ other) (NNS substances))) (PP (IN throughout) (NP (DT the) (NN body)))) (. .)))