( ( The liver ) ( ( makes ( ( ( urea and ) ( the kidney ) ) ( ( puts ( the urea ) ) ( into ( our urine ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN liver)) (VP (VBZ makes) (SBAR (S (NP (NP (NN urea)) (CC and) (NP (DT the) (NN kidney))) (VP (VBZ puts) (NP (DT the) (NN urea)) (PP (IN into) (NP (PRP$ our) (NN urine))))))) (. .)))
The liver makes urea and the kidney puts the urea into our urine.
(ROOT (S (NP (NNP Urea)) (VP (VBZ is) (VP (VP (VBN made) (PP (IN in) (NP (DT the) (NN liver)))) (CC and) (VP (VBN excreted) (PP (IN in) (NP (NN urine)))))) (. .)))
Urea is made in the liver and excreted in urine.