( ( ( The circulation ) ( of ( a foetus ) ) ) ( ( is ( very ( different ( from ( that ( of ( ( ( a ( new ( born baby ) ) ) , ) ( ( ( being ( connected ( to ( a placenta ) ) ) ) and ) ( ( having ( ( three ( extra channels ) ) ( that ( must ( ( close or ) reverse ) ) ) ) ) ( at birth ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN circulation)) (PP (IN of) (NP (DT a) (NNS foetus)))) (VP (VBZ is) (ADJP (RB very) (JJ different) (PP (IN from) (NP (NP (DT that)) (PP (IN of) (NP (NP (DT a) (JJ new) (VBN born) (NN baby)) (, ,) (VP (VP (VBG being) (VP (VBN connected) (PP (TO to) (NP (DT a) (NN placenta))))) (CC and) (VP (VBG having) (NP (NP (CD three) (JJ extra) (NNS channels)) (SBAR (WHNP (WDT that)) (S (VP (MD must) (VP (VB close) (CC or) (VB reverse)))))) (PP (IN at) (NP (NN birth))))))))))) (. .)))
The circulation of a foetus is very different from that of a new born baby, being connected to a placenta and having three extra channels that must close or reverse at birth.
(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))))))) (. .)))