( ( From ( the ( right atrium ) ) ) ( , ( blood ( ( goes ( to ( ( ( the ( right ventricle ) ) , ) ( which ( ( ( pumps it ) ( to ( the lungs ) ) ) ( where ( it ( is ( replenished ( with oxygen ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN From) (NP (DT the) (JJ right) (NN atrium))) (, ,) (NP (NN blood)) (VP (VBZ goes) (PP (TO to) (NP (NP (DT the) (JJ right) (NN ventricle)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBD pumps) (NP (PRP it)) (PP (TO to) (NP (DT the) (NNS lungs))) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN replenished) (PP (IN with) (NP (NN oxygen))))))))))))) (. .)))
From the right atrium, blood goes to the right ventricle, which pumps it to the lungs where it is replenished with oxygen.
(ROOT (S (NP (DT The) (JJ right) (NN atrium)) (VP (VBZ receives) (NP (JJ oxygen-poor) (NN blood)) (PP (IN from) (NP (DT the) (NN body))) (, ,) (S (ADVP (RB then)) (VP (VBG pumps) (NP (DT the) (NN blood)) (PP (IN into) (NP (DT the) (JJ right) (NN ventricle)))))) (. .)))