( ( in effect ) ( we ( ( assumed ( that ( ( the lungs ) ( consist ( of ( ( one alveolus ) ( supplied ( by ( ( ( one capillary ) , ) ( which ( ( is not ) ( the case ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN in) (NP (NN effect))) (NP (PRP we)) (VP (VBD assumed) (SBAR (IN that) (S (NP (DT the) (NNS lungs)) (VP (VBP consist) (PP (IN of) (NP (NP (CD one) (NNS alveolus)) (VP (VBN supplied) (PP (IN by) (NP (NP (CD one) (NN capillary)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (RB not) (NP (DT the) (NN case)))))))))))))) (. .)))
in effect we assumed that the lungs consist of one alveolus supplied by one capillary, which is not the case.
(ROOT (S (NP (NP (DT The) (NNS lungs)) (PP (IN of) (NP (NNS mammals)))) (VP (VBP are) (ADJP (JJ unique) (PP (IN in) (S (VP (VBG having) (NP (NNS alveoli))))))) (. .)))