( Urine ( ( ( travels down ) ( tubes ( ( called ureters ) ( into ( ( a ( muscular sac ) ) ( called ( ( ( the ( urinary bladder ) ) , ) ( which ( stores ( the urine ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Urine)) (VP (VBZ travels) (PRT (RP down)) (NP (NP (NNS tubes)) (VP (VBN called) (NP (NNS ureters)) (PP (IN into) (NP (NP (DT a) (JJ muscular) (NN sac)) (VP (VBN called) (NP (NP (DT the) (JJ urinary) (NN bladder)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ stores) (NP (DT the) (NN urine)))))))))))) (. .)))
Urine travels down tubes called ureters into a muscular sac called the urinary bladder, which stores the urine.
(ROOT (S (NP (DT The) (JJ urinary) (NN bladder)) (VP (VBZ is) (NP (NP (DT the) (ADJP (JJ hollow) (CC and) (JJ muscular)) (JJ balloon-shaped) (NN organ)) (SBAR (WHNP (WDT that)) (S (VP (VBZ collects) (NP (NN urine))))))) (. .)))