( ( ( Closed ( circulatory systems ) ) ( -LRB- ( ( evolved ( in ( ( echinoderms and ) vertebrates ) ) ) -RRB- ) ) ) ( ( have ( ( the blood ) ( ( closed ( at ( all times ) ) ) ( within ( vessels ( of ( different ( size ( and ( wall thickness ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Closed) (NN circulatory) (NNS systems)) (PRN (-LRB- -LRB-) (VP (VBN evolved) (PP (IN in) (NP (NNS echinoderms) (CC and) (NNS vertebrates)))) (-RRB- -RRB-))) (VP (VBP have) (NP (NP (DT the) (NN blood)) (VP (VBN closed) (PP (IN at) (NP (DT all) (NNS times))) (PP (IN within) (NP (NP (NNS vessels)) (PP (IN of) (NP (JJ different) (NN size) (CC and) (NN wall) (NN thickness)))))))) (. .)))
Closed circulatory systems (evolved in echinoderms and vertebrates) have the blood closed at all times within vessels of different size and wall thickness.
(ROOT (S (NP (NNS Echinoderms)) (VP (VBP possess) (NP (DT a) (JJ water-based) (NN circulatory) (NN system))) (. .)))