( it ( ( consists ( of ( the ( heart ( , ( ( blood vessels ) ( , ( and ( lymph vessels ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP it)) (VP (VBZ consists) (PP (IN of) (NP (DT the) (NX (NX (NN heart)) (, ,) (NX (NN blood) (NNS vessels)) (, ,) (CC and) (NX (JJ lymph) (NNS vessels)))))) (. .)))
it consists of the heart, blood vessels, and lymph vessels.
(ROOT (S (NP (JJ Lymph) (NNS vessels)) (VP (VBP are) (PP (IN like) (NP (NN blood) (NNS vessels))) (, ,) (SBAR (IN except) (S (NP (PRP they)) (VP (VBP move) (NP (NP (NN lymph)) (PP (RB instead) (IN of) (NP (NN blood)))))))) (. .)))