( ( Because ( children ( have ( ( ( immature organs ) and ) ( ( different ( ( ( metabolic and ) immune ) systems ) ) ( than adults ) ) ) ) ) ) ( , ( they ( ( ( react differently ) ( to drugs ) ) . ) ) ) )
(ROOT (S (SBAR (IN Because) (S (NP (NNS children)) (VP (VBP have) (NP (NP (JJ immature) (NNS organs)) (CC and) (NP (NP (JJ different) (ADJP (JJ metabolic) (CC and) (JJ immune)) (NNS systems)) (PP (IN than) (NP (NNS adults)))))))) (, ,) (NP (PRP they)) (VP (VBP react) (ADVP (RB differently)) (PP (TO to) (NP (NNS drugs)))) (. .)))
Because children have immature organs and different metabolic and immune systems than adults, they react differently to drugs.
(ROOT (S (NP (DT Each) (NN lymph) (NN organ)) (VP (VBZ has) (NP (NP (DT a) (JJ different) (NN job)) (PP (IN in) (NP (DT the) (JJ immune) (NN system))))) (. .)))