( ( To ( get it ) ) ( ( requires ( extra ( blood ( and ( lymph vessels ) ) ) ) ) . ) )
(ROOT (S (S (VP (TO To) (VP (VB get) (NP (PRP it))))) (VP (VBZ requires) (NP (JJ extra) (NN blood) (CC and) (NN lymph) (NNS vessels))) (. .)))
To get it requires extra blood 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)))))))) (. .)))