( This ( ( means ( that ( ( unlike ( ( many ( other kinds ) ) ( of animals ) ) ) ( , ( they ( have ( ( no ( arteries ( , ( ( veins or ) capillaries ) ) ) ) ( to ( carry blood ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ means) (SBAR (IN that) (S (PP (IN unlike) (NP (NP (JJ many) (JJ other) (NNS kinds)) (PP (IN of) (NP (NNS animals))))) (, ,) (NP (PRP they)) (VP (VBP have) (NP (NP (DT no) (NNS arteries) (, ,) (NNS veins) (CC or) (NNS capillaries)) (SBAR (S (VP (TO to) (VP (VB carry) (NP (NN blood))))))))))) (. .)))
This means that unlike many other kinds of animals, they have no arteries, veins or capillaries to carry blood.
(ROOT (S (NP (JJ Portal) (NNS veins)) (VP (VBP carry) (NP (NP (NN blood)) (PP (IN between) (NP (NP (NNS pairs)) (PP (IN of) (NP (JJ capillary) (NNS beds))))))) (. .)))