( ( ( ( ( ( Lymphatic vessels ) ( ( ( are ( similar ( to veins ) ) ) , ) ( except ( they ( carry ( lymph ( instead ( of blood ) ) ) ) ) ) ) ) , ) and ) ( ( rather ( than ( circulating ( like blood ) ) ) ) ( , ( lymph ( moves ( in ( one direction ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (JJ Lymphatic) (NNS vessels)) (VP (VBP are) (ADJP (JJ similar) (PP (TO to) (NP (NNS veins)))) (, ,) (SBAR (IN except) (S (NP (PRP they)) (VP (VBP carry) (NP (NP (NN lymph)) (PP (RB instead) (IN of) (NP (NN blood))))))))) (, ,) (CC and) (S (PP (RB rather) (IN than) (S (VP (VBG circulating) (PP (IN like) (NP (NN blood)))))) (, ,) (NP (NN lymph)) (VP (VBZ moves) (PP (IN in) (NP (CD one) (NN direction))))) (. .)))
Lymphatic vessels are similar to veins, except they carry lymph instead of blood, and rather than circulating like blood, lymph moves in one direction.
(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)))))))) (. .)))