( ( ( The ( two chambers ) ) ( at ( the bottom ) ) ) ( ( are ( ( ( the ( ( ( left and ) right ) ventricles ) ) , ) ( sometimes ( ( known ( as ( the ( pumping chambers ) ) ) ) ( as ( they ( are ( responsible ( for ( ( pumping ( the blood ) ) ( to ( ( ( the lungs ) and ) ( the body ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (CD two) (NNS chambers)) (PP (IN at) (NP (DT the) (NN bottom)))) (VP (VBP are) (NP (NP (DT the) (ADJP (VBN left) (CC and) (JJ right)) (NNS ventricles)) (, ,) (VP (ADVP (RB sometimes)) (VBN known) (PP (IN as) (NP (DT the) (JJ pumping) (NNS chambers))) (SBAR (IN as) (S (NP (PRP they)) (VP (VBP are) (ADJP (JJ responsible) (PP (IN for) (S (VP (VBG pumping) (NP (DT the) (NN blood)) (PP (TO to) (NP (NP (DT the) (NNS lungs)) (CC and) (NP (DT the) (NN body)))))))))))))) (. .)))
The two chambers at the bottom are the left and right ventricles, sometimes known as the pumping chambers as they are responsible for pumping the blood to the lungs and the body.
(ROOT (S (NP (NP (NNP Blood)) (PP (IN from) (NP (DT the) (NN body)))) (VP (VBZ enters) (NP (NP (JJ right) (NN atrium)) (PP (IN of) (NP (DT the) (NN heart)))) (SBAR (IN before) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN pumped) (PP (PP (TO to) (NP (DT the) (JJ right) (NN ventricle))) (CC and) (RB then) (PP (TO to) (NP (DT the) (NNS lungs))))))))) (. .)))