( ( ( The poisons ) ( that ( ( a smoker ) ( ( ( takes in ) , ) ( such ( as ( nicotine ( and ( carbon monoxide ) ) ) ) ) ) ) ) ) ( ( goes ( through ( ( ( the placenta ) , ) ( which ( is ( ( the tissue ) ( ( ( connecting ( the baby ) ) ( to ( the mother ) ) ) ( before ( it ( is born ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS poisons)) (SBAR (IN that) (S (NP (DT a) (NN smoker)) (VP (VBZ takes) (PRT (RP in)) (, ,) (PP (JJ such) (IN as) (NP (NN nicotine) (CC and) (NN carbon) (NN monoxide))))))) (VP (VBZ goes) (PP (IN through) (NP (NP (DT the) (NN placenta)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (NP (NP (DT the) (NN tissue)) (VP (VBG connecting) (NP (DT the) (NN baby)) (PP (TO to) (NP (DT the) (NN mother))) (SBAR (IN before) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN born))))))))))))) (. .)))
The poisons that a smoker takes in, such as nicotine and carbon monoxide goes through the placenta, which is the tissue connecting the baby to the mother before it is born.
(ROOT (S (NP (NP (DT A) (NN connection)) (PP (TO to) (NP (DT the) (NN placenta)))) (VP (VBZ is) (VP (VBN required) (PP (IN for) (NP (DT a) (JJ newborn) (NN baby))) (S (VP (TO to) (VP (VB begin) (NP (NN breathing))))))) (. .)))